Merge "Improved color extraction algorithm" into ub-launcher3-dorval-polish

1 files changed, 490 insertions, 45 deletions

diff --git a/src/com/android/launcher3/dynamicui/ColorExtractionAlgorithm.java b/src/com/android/launcher3/dynamicui/ColorExtractionAlgorithm.java
index 5a0e78b12..21d5b2744 100644
--- a/src/com/android/launcher3/dynamicui/ColorExtractionAlgorithm.java
+++ b/src/com/android/launcher3/dynamicui/ColorExtractionAlgorithm.java
@@ -23,6 +23,7 @@ import android.support.annotation.Nullable;
 import android.support.v4.graphics.ColorUtils;
 import android.util.Log;
 import android.util.Pair;
+import android.util.Range;
 import android.util.SparseIntArray;
 
 import com.android.launcher3.R;
@@ -51,16 +52,18 @@ public class ColorExtractionAlgorithm {
     private static final float FIT_WEIGHT_S = 1.0f;
     private static final float FIT_WEIGHT_L = 10.0f;
 
+    // When extracting the main color, only consider colors
+    // present in at least MIN_COLOR_OCCURRENCE of the image
     private static final float MIN_COLOR_OCCURRENCE = 0.1f;
-    private static final float MIN_LUMINOSITY = 0.5f;
 
-    public ColorExtractionAlgorithm() {
-    }
+    // Temporary variable to avoid allocations
+    private final float[] mTmpHSL = new float[3];
 
     public @Nullable Pair<Integer, Integer> extractInto(WallpaperColorsCompat wallpaperColors) {
         if (wallpaperColors == null) {
             return null;
         }
+
         SparseIntArray colorsArray = wallpaperColors.getColors();
         if (colorsArray.size() == 0) {
             return null;
@@ -71,13 +74,12 @@ public class ColorExtractionAlgorithm {
         // and replaces the original palette
 
         List<Pair<Integer, Integer>> colors = new ArrayList<>(colorsArray.size());
-        for (int i = colorsArray.size() - 1; i >= 0; i --) {
+        for (int i = colorsArray.size() - 1; i >= 0; i--) {
             colors.add(Pair.create(colorsArray.keyAt(i), colorsArray.valueAt(i)));
         }
 
         // First find the most representative color in the image
         populationSort(colors);
-
         // Calculate total
         int total = 0;
         for (Pair<Integer, Integer> weightedColor : colors) {
@@ -96,53 +98,80 @@ public class ColorExtractionAlgorithm {
             int colorValue = weightedColor.first;
             ColorUtils.RGBToHSL(Color.red(colorValue), Color.green(colorValue),
                     Color.blue(colorValue), hsl);
-            if (hsl[2] > MIN_LUMINOSITY) {
+
+            // Stop when we find a color that meets our criteria
+            if (!isBlacklisted(hsl)) {
                 bestColor = weightedColor;
+                break;
             }
         }
 
-        // Fallback to first color
+        // Fail if not found
         if (bestColor == null) {
-            bestColor = colors.get(0);
+            return null;
         }
 
         int colorValue = bestColor.first;
         ColorUtils.RGBToHSL(Color.red(colorValue), Color.green(colorValue), Color.blue(colorValue),
                 hsl);
-        hsl[0] /= 360.0f; // normalize
 
-        // TODO, we're finding a tonal palette for a hue, not all components
+        // The Android HSL definition requires the hue to go from 0 to 360 but
+        // the Material Tonal Palette defines hues from 0 to 1.
+        hsl[0] /= 360f;
+
+        // Find the palette that contains the closest color
         TonalPalette palette = findTonalPalette(hsl[0]);
 
-        // Fall back to population sort if we couldn't find a tonal palette
         if (palette == null) {
             Log.w(TAG, "Could not find a tonal palette!");
             return null;
         }
 
+        // Figure out what's the main color index in the optimal palette
         int fitIndex = bestFit(palette, hsl[0], hsl[1], hsl[2]);
         if (fitIndex == -1) {
             Log.w(TAG, "Could not find best fit!");
             return null;
         }
+
+        // Generate the 10 colors palette by offsetting each one of them
         float[] h = fit(palette.h, hsl[0], fitIndex,
                 Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY);
         float[] s = fit(palette.s, hsl[1], fitIndex, 0.0f, 1.0f);
         float[] l = fit(palette.l, hsl[2], fitIndex, 0.0f, 1.0f);
 
+        final int textInversionIndex = h.length - 3;
 
-        hsl[0] = fract(h[0]) * 360.0f;
-        hsl[1] = s[0];
-        hsl[2] = l[0];
-        int mainColor = ColorUtils.HSLToColor(hsl);
+        // best fit + a 2 colors offset
+        int primaryIndex = fitIndex;
+        int secondaryIndex = primaryIndex + (primaryIndex >= 2 ? -2 : 2);
+        int mainColor = getColorInt(primaryIndex, h, s, l);
+        int secondaryColor = getColorInt(secondaryIndex, h, s, l);
 
-        hsl[0] = fract(h[1]) * 360.0f;
-        hsl[1] = s[1];
-        hsl[2] = l[1];
-        int secondaryColor = ColorUtils.HSLToColor(hsl);
         return new Pair<>(mainColor, secondaryColor);
     }
 
+    private int getColorInt(int fitIndex, float[] h, float[] s, float[] l) {
+        mTmpHSL[0] = fract(h[fitIndex]) * 360.0f;
+        mTmpHSL[1] = s[fitIndex];
+        mTmpHSL[2] = l[fitIndex];
+        return ColorUtils.HSLToColor(mTmpHSL);
+    }
+
+    /**
+     * Checks if a given color exists in the blacklist
+     * @param hsl float array with 3 components (H 0..360, S 0..1 and L 0..1)
+     * @return true if color should be avoided
+     */
+    private boolean isBlacklisted(float[] hsl) {
+        for (ColorRange badRange: BLACKLISTED_COLORS) {
+            if (badRange.containsColor(hsl[0], hsl[1], hsl[2])) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     private static void populationSort(@NonNull List<Pair<Integer, Integer>> wallpaperColors) {
         Collections.sort(wallpaperColors, new Comparator<Pair<Integer, Integer>>() {
             @Override
@@ -160,7 +189,7 @@ public class ColorExtractionAlgorithm {
      * @param index which index to calculate the delta against
      * @param min minimum accepted value (clamp)
      * @param max maximum accepted value (clamp)
-     * @return
+     * @return new shifted palette
      */
     private static float[] fit(float[] data, float v, int index, float min, float max) {
         float[] fitData = new float[data.length];
@@ -272,44 +301,460 @@ public class ColorExtractionAlgorithm {
 
     // Data definition of Material Design tonal palettes
     // When the sort type is set to TONAL, these palettes are used to find
-    // a best fist. Each palette is defined as 10 HSL colors
+    // a best fit. Each palette is defined as 22 HSL colors
     private static final TonalPalette[] TONAL_PALETTES = {
-            // Orange
             new TonalPalette(
-                    new float[] { 0.028f, 0.042f, 0.053f, 0.061f, 0.078f, 0.1f, 0.111f, 0.111f, 0.111f, 0.111f },
-                    new float[] { 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f },
-                    new float[] { 0.5f, 0.53f, 0.54f, 0.55f, 0.535f, 0.52f, 0.5f, 0.63f, 0.75f, 0.85f }
+                    new float[]{0.991f, 0.9833333333333333f, 0f, 0f, 0f, 0.01134380453752181f,
+                            0.015625000000000003f, 0.024193548387096798f, 0.027397260273972573f,
+                            0.017543859649122865f},
+                    new float[]{1f, 1f, 1f, 1f, 0.8434782608695652f, 1f, 1f, 1f, 1f, 1f},
+                    new float[]{0.2f, 0.27450980392156865f, 0.34901960784313724f,
+                            0.4235294117647059f, 0.5490196078431373f, 0.6254901960784314f,
+                            0.6862745098039216f, 0.7568627450980392f, 0.8568627450980393f,
+                            0.9254901960784314f}
             ),
-            // Yellow
             new TonalPalette(
-                    new float[] { 0.111f, 0.111f, 0.125f, 0.133f, 0.139f, 0.147f, 0.156f, 0.156f, 0.156f, 0.156f },
-                    new float[] { 1f, 0.942f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f },
-                    new float[] { 0.43f, 0.484f, 0.535f, 0.555f, 0.57f, 0.575f, 0.595f, 0.715f, 0.78f, 0.885f }
+                    new float[]{0.6385767790262171f, 0.6301169590643275f, 0.6223958333333334f,
+                            0.6151079136690647f, 0.6065400843881856f, 0.5986964618249534f,
+                            0.5910746812386157f, 0.5833333333333334f, 0.5748031496062993f,
+                            0.5582010582010583f},
+                    new float[]{1f, 1f, 0.9014084507042253f, 0.8128654970760234f,
+                            0.7979797979797981f, 0.7816593886462883f, 0.778723404255319f,
+                            1f, 1f, 1f},
+                    new float[]{0.17450980392156862f, 0.2235294117647059f, 0.2784313725490196f,
+                            0.3352941176470588f, 0.388235294117647f, 0.44901960784313727f,
+                            0.5392156862745098f, 0.6509803921568628f, 0.7509803921568627f,
+                            0.8764705882352941f}
             ),
-            // Green
             new TonalPalette(
-                    new float[] { 0.325f, 0.336f, 0.353f, 0.353f, 0.356f, 0.356f, 0.356f, 0.356f, 0.356f, 0.356f },
-                    new float[] { 1f, 1f, 0.852f, 0.754f, 0.639f, 0.667f, 0.379f, 0.542f, 1f, 1f },
-                    new float[] { 0.06f, 0.1f, 0.151f, 0.194f, 0.25f, 0.312f, 0.486f, 0.651f, 0.825f, 0.885f }
+                    new float[]{0.5669934640522876f, 0.5748031496062993f,
+                            0.5595238095238095f, 0.5473118279569893f, 0.5393258426966292f,
+                            0.5315955766192734f, 0.524031007751938f, 0.5154711673699016f,
+                            0.508080808080808f, 0.5f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 1f, 0.8847736625514403f, 1f, 1f, 1f},
+                    new float[]{0.2f, 0.24901960784313726f, 0.27450980392156865f,
+                            0.30392156862745096f, 0.34901960784313724f, 0.4137254901960784f,
+                            0.47647058823529415f, 0.5352941176470588f, 0.6764705882352942f, 0.8f}
             ),
-            // Blue
             new TonalPalette(
-                    new float[] { 0.631f, 0.603f, 0.592f, 0.586f, 0.572f, 0.544f, 0.519f, 0.519f, 0.519f, 0.519f },
-                    new float[] { 0.852f, 1f, 0.887f, 0.852f, 0.871f, 0.907f, 0.949f, 0.934f, 0.903f, 0.815f },
-                    new float[] { 0.34f, 0.38f, 0.482f, 0.497f, 0.536f, 0.571f, 0.608f, 0.696f, 0.794f, 0.892f }
+                    new float[]{0.5082304526748972f, 0.5069444444444444f, 0.5f, 0.5f,
+                            0.5f, 0.48724954462659376f, 0.4800347222222222f,
+                            0.4755134281200632f, 0.4724409448818897f, 0.4671052631578947f},
+                    new float[]{1f, 0.8888888888888887f, 0.9242424242424242f, 1f, 1f,
+                            0.8133333333333332f, 0.7868852459016393f, 1f, 1f, 1f},
+                    new float[]{0.1588235294117647f, 0.21176470588235297f,
+                            0.25882352941176473f, 0.3f, 0.34901960784313724f,
+                            0.44117647058823534f, 0.5215686274509804f, 0.5862745098039216f,
+                            0.7509803921568627f, 0.8509803921568627f}
             ),
-            // Purple
             new TonalPalette(
-                    new float[] { 0.839f, 0.831f, 0.825f, 0.819f, 0.803f, 0.803f, 0.772f, 0.772f, 0.772f, 0.772f },
-                    new float[] { 1f, 1f, 1f, 1f, 1f, 1f, 0.769f, 0.701f, 0.612f, 0.403f },
-                    new float[] { 0.125f, 0.15f, 0.2f, 0.245f, 0.31f, 0.36f, 0.567f, 0.666f, 0.743f, 0.833f }
+                    new float[]{0.3333333333333333f, 0.3333333333333333f,
+                            0.34006734006734f, 0.34006734006734f, 0.34006734006734f,
+                            0.34259259259259256f, 0.3475783475783476f, 0.34767025089605735f,
+                            0.3467741935483871f, 0.3703703703703704f},
+                    new float[]{0.6703296703296703f, 0.728813559322034f,
+                            0.5657142857142856f, 0.5076923076923077f, 0.3944223107569721f,
+                            0.6206896551724138f, 0.8931297709923666f, 1f, 1f, 1f},
+                    new float[]{0.1784313725490196f, 0.23137254901960785f,
+                            0.3431372549019608f, 0.38235294117647056f, 0.49215686274509807f,
+                            0.6588235294117647f, 0.7431372549019608f, 0.8176470588235294f,
+                            0.8784313725490196f, 0.9294117647058824f}
+            ),
+            new TonalPalette(
+                    new float[]{0.162280701754386f, 0.15032679738562088f,
+                            0.15879265091863518f, 0.16236559139784948f, 0.17443868739205526f,
+                            0.17824074074074076f, 0.18674698795180725f,
+                            0.18692449355432778f, 0.1946778711484594f, 0.18604651162790695f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+                    new float[]{0.14901960784313725f, 0.2f, 0.24901960784313726f,
+                            0.30392156862745096f, 0.3784313725490196f, 0.4235294117647059f,
+                            0.48823529411764705f, 0.6450980392156863f, 0.7666666666666666f,
+                            0.8313725490196078f}
+            ),
+            new TonalPalette(
+                    new float[]{0.10619469026548674f, 0.11924686192468618f,
+                            0.13046448087431692f, 0.14248366013071895f, 0.1506024096385542f,
+                            0.16220238095238093f, 0.16666666666666666f,
+                            0.16666666666666666f, 0.162280701754386f, 0.15686274509803924f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+                    new float[]{0.44313725490196076f, 0.46862745098039216f,
+                            0.47843137254901963f, 0.5f, 0.5117647058823529f,
+                            0.5607843137254902f, 0.6509803921568628f, 0.7509803921568627f,
+                            0.8509803921568627f, 0.9f}
+            ),
+            new TonalPalette(
+                    new float[]{0.03561253561253561f, 0.05098039215686275f,
+                            0.07516339869281045f, 0.09477124183006536f, 0.1150326797385621f,
+                            0.134640522875817f, 0.14640522875816991f, 0.1582397003745319f,
+                            0.15773809523809523f, 0.15359477124183002f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+                    new float[]{0.4588235294117647f, 0.5f, 0.5f, 0.5f, 0.5f, 0.5f,
+                            0.5f, 0.6509803921568628f, 0.7803921568627451f, 0.9f}
+            ),
+            new TonalPalette(
+                    new float[]{0.9596491228070175f, 0.9593837535014005f,
+                            0.9514767932489452f, 0.943859649122807f, 0.9396825396825397f,
+                            0.9395424836601307f, 0.9393939393939394f, 0.9362745098039216f,
+                            0.9754098360655739f, 0.9824561403508771f},
+                    new float[]{0.84070796460177f, 0.8206896551724138f,
+                            0.7979797979797981f, 0.7661290322580644f, 0.9051724137931036f,
+                            1f, 1f, 1f, 1f, 1f},
+                    new float[]{0.22156862745098038f, 0.2843137254901961f,
+                            0.388235294117647f, 0.48627450980392156f, 0.5450980392156863f,
+                            0.6f, 0.6764705882352942f, 0.8f, 0.8803921568627451f,
+                            0.9254901960784314f}
+            ),
+            new TonalPalette(
+                    new float[]{0.841025641025641f, 0.8333333333333334f,
+                            0.8285256410256411f, 0.821522309711286f, 0.8083333333333333f,
+                            0.8046594982078853f, 0.8005822416302766f, 0.7842377260981912f,
+                            0.7771084337349398f, 0.7747747747747749f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 1f, 1f,
+                            0.737142857142857f, 0.6434108527131781f, 0.46835443037974644f},
+                    new float[]{0.12745098039215685f, 0.15490196078431373f,
+                            0.20392156862745098f, 0.24901960784313726f, 0.3137254901960784f,
+                            0.36470588235294116f, 0.44901960784313727f,
+                            0.6568627450980392f, 0.7470588235294118f, 0.8450980392156863f}
+            ),
+            new TonalPalette(
+                    new float[]{0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f},
+                    new float[]{0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f},
+                    new float[]{0.14901960784313725f, 0.2f, 0.2980392156862745f, 0.4f,
+                            0.4980392156862745f, 0.6196078431372549f, 0.7176470588235294f,
+                            0.8196078431372549f, 0.9176470588235294f, 0.9490196078431372f}
+            ),
+            new TonalPalette(
+                    new float[]{0.955952380952381f, 0.9681069958847737f,
+                            0.9760479041916167f, 0.9873563218390804f, 0f, 0f,
+                            0.009057971014492771f, 0.026748971193415648f,
+                            0.041666666666666616f, 0.05303030303030304f},
+                    new float[]{1f, 0.8350515463917526f, 0.6929460580912863f,
+                            0.6387665198237885f, 0.6914893617021276f, 0.7583892617449666f,
+                            0.8070175438596495f, 0.9310344827586209f, 1f, 1f},
+                    new float[]{0.27450980392156865f, 0.3803921568627451f,
+                            0.4725490196078432f, 0.5549019607843138f, 0.6313725490196078f,
+                            0.707843137254902f, 0.7764705882352941f, 0.8294117647058823f,
+                            0.9058823529411765f, 0.9568627450980391f}
+            ),
+            new TonalPalette(
+                    new float[]{0.7514619883040936f, 0.7679738562091503f,
+                            0.7802083333333333f, 0.7844311377245509f, 0.796875f,
+                            0.8165618448637316f, 0.8487179487179487f, 0.8582375478927203f,
+                            0.8562091503267975f, 0.8666666666666667f},
+                    new float[]{1f, 1f, 0.8163265306122449f, 0.6653386454183268f,
+                            0.7547169811320753f, 0.929824561403509f, 0.9558823529411766f,
+                            0.9560439560439562f, 1f, 1f},
+                    new float[]{0.2235294117647059f, 0.3f, 0.38431372549019605f,
+                            0.492156862745098f, 0.5843137254901961f, 0.6647058823529411f,
+                            0.7333333333333334f, 0.8215686274509804f, 0.9f,
+                            0.9411764705882353f}
+            ),
+            new TonalPalette(
+                    new float[]{0.6666666666666666f, 0.6666666666666666f,
+                            0.6666666666666666f, 0.6666666666666666f, 0.6666666666666666f,
+                            0.6666666666666666f, 0.6666666666666666f, 0.6666666666666666f,
+                            0.6666666666666666f, 0.6666666666666666f},
+                    new float[]{0.24590163934426232f, 0.17880794701986752f,
+                            0.14606741573033713f, 0.13761467889908252f, 0.14893617021276592f,
+                            0.16756756756756758f, 0.20312500000000017f,
+                            0.26086956521739135f, 0.29999999999999966f, 0.5000000000000004f},
+                    new float[]{0.2392156862745098f, 0.296078431372549f,
+                            0.34901960784313724f, 0.4274509803921569f, 0.5392156862745098f,
+                            0.6372549019607843f, 0.7490196078431373f, 0.8196078431372549f,
+                            0.8823529411764706f, 0.9372549019607843f}
+            ),
+            new TonalPalette(
+                    new float[]{0.9678571428571429f, 0.9944812362030905f, 0f, 0f,
+                            0.0047348484848484815f, 0.00316455696202532f, 0f,
+                            0.9980392156862745f, 0.9814814814814816f, 0.9722222222222221f},
+                    new float[]{1f, 0.7023255813953488f, 0.6638655462184874f,
+                            0.6521739130434782f, 0.7719298245614035f, 0.8315789473684211f,
+                            0.6867469879518071f, 0.7264957264957265f, 0.8181818181818182f,
+                            0.8181818181818189f},
+                    new float[]{0.27450980392156865f, 0.4215686274509804f,
+                            0.4666666666666667f, 0.503921568627451f, 0.5529411764705883f,
+                            0.6274509803921569f, 0.6745098039215687f, 0.7705882352941176f,
+                            0.892156862745098f, 0.9568627450980391f}
+            ),
+            new TonalPalette(
+                    new float[]{0.9052287581699346f, 0.9112021857923498f, 0.9270152505446624f,
+                            0.9343137254901961f, 0.9391534391534391f, 0.9437984496124031f,
+                            0.943661971830986f, 0.9438943894389439f, 0.9426229508196722f,
+                            0.9444444444444444f},
+                    new float[]{1f, 0.8133333333333332f, 0.7927461139896375f, 0.7798165137614679f,
+                            0.7777777777777779f, 0.8190476190476191f, 0.8255813953488372f,
+                            0.8211382113821142f, 0.8133333333333336f, 0.8000000000000006f},
+                    new float[]{0.2f, 0.29411764705882354f, 0.3784313725490196f,
+                            0.42745098039215684f, 0.4764705882352941f, 0.5882352941176471f,
+                            0.6627450980392157f, 0.7588235294117647f, 0.8529411764705882f,
+                            0.9411764705882353f}
             ),
-            // Red
             new TonalPalette(
-                    new float[] { 0.964f, 0.975f, 0.975f, 0.975f, 0.972f, 0.992f, 1.003f, 1.011f, 1.011f, 1.011f },
-                    new float[] { 0.869f, 0.802f, 0.739f, 0.903f, 1f, 1f, 1f, 1f, 1f, 1f },
-                    new float[] { 0.241f, 0.316f, 0.46f, 0.586f, 0.655f, 0.7f, 0.75f, 0.8f, 0.84f, 0.88f }
+                    new float[]{0.6884057971014492f, 0.6974789915966387f, 0.7079889807162534f,
+                            0.7154471544715447f, 0.7217741935483872f, 0.7274143302180687f,
+                            0.7272727272727273f, 0.7258064516129031f, 0.7252252252252251f,
+                            0.7333333333333333f},
+                    new float[]{0.8214285714285715f, 0.6878612716763006f, 0.6080402010050251f,
+                            0.5774647887323943f, 0.5391304347826086f, 0.46724890829694316f,
+                            0.4680851063829788f, 0.462686567164179f, 0.45679012345678977f,
+                            0.4545454545454551f},
+                    new float[]{0.2196078431372549f, 0.33921568627450976f, 0.39019607843137255f,
+                            0.4176470588235294f, 0.45098039215686275f,
+                            0.5509803921568628f, 0.6313725490196078f, 0.7372549019607844f,
+                            0.8411764705882353f, 0.9352941176470588f}
+            ),
+            new TonalPalette(
+                    new float[]{0.6470588235294118f, 0.6516666666666667f, 0.6464174454828661f,
+                            0.6441441441441442f, 0.6432748538011696f, 0.6416666666666667f,
+                            0.6402439024390243f, 0.6412429378531074f, 0.6435185185185186f,
+                            0.6428571428571429f},
+                    new float[]{0.8095238095238095f, 0.6578947368421053f, 0.5721925133689839f,
+                            0.5362318840579711f, 0.5f, 0.4424778761061947f, 0.44086021505376327f,
+                            0.44360902255639095f,
+                            0.4499999999999997f, 0.4375000000000006f},
+                    new float[]{0.16470588235294117f, 0.2980392156862745f, 0.36666666666666664f,
+                            0.40588235294117647f, 0.44705882352941173f,
+                            0.5568627450980392f, 0.6352941176470588f, 0.7392156862745098f,
+                            0.8431372549019608f, 0.9372549019607843f}
+            ),
+            new TonalPalette(
+                    new float[]{0.46732026143790845f, 0.4718614718614719f, 0.4793650793650794f,
+                            0.48071625344352614f, 0.4829683698296837f, 0.484375f,
+                            0.4841269841269842f, 0.48444444444444457f, 0.48518518518518516f,
+                            0.4907407407407408f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 0.6274509803921569f, 0.41832669322709176f,
+                            0.41899441340782106f, 0.4128440366972478f,
+                            0.4090909090909088f},
+                    new float[]{0.1f, 0.15098039215686274f, 0.20588235294117646f,
+                            0.2372549019607843f, 0.26862745098039215f, 0.4f, 0.5078431372549019f,
+                            0.6490196078431372f, 0.7862745098039216f, 0.9137254901960784f}
+            ),
+            new TonalPalette(
+                    new float[]{0.5444444444444444f, 0.5555555555555556f, 0.5555555555555556f,
+                            0.553763440860215f, 0.5526315789473684f, 0.5555555555555556f,
+                            0.5555555555555555f, 0.5555555555555556f, 0.5512820512820514f,
+                            0.5666666666666667f},
+                    new float[]{0.24590163934426232f, 0.19148936170212766f, 0.1791044776119403f,
+                            0.18343195266272191f, 0.18446601941747576f,
+                            0.1538461538461539f, 0.15625000000000003f, 0.15328467153284678f,
+                            0.15662650602409653f, 0.151515151515151f},
+                    new float[]{0.1196078431372549f, 0.1843137254901961f, 0.2627450980392157f,
+                            0.33137254901960783f, 0.403921568627451f, 0.5411764705882354f,
+                            0.6235294117647059f, 0.7313725490196079f, 0.8372549019607843f,
+                            0.9352941176470588f}
+            ),
+            new TonalPalette(
+                    new float[]{0.022222222222222223f, 0.02469135802469136f, 0.031249999999999997f,
+                            0.03947368421052631f, 0.04166666666666668f,
+                            0.043650793650793655f, 0.04411764705882352f, 0.04166666666666652f,
+                            0.04444444444444459f, 0.05555555555555529f},
+                    new float[]{0.33333333333333337f, 0.2783505154639175f, 0.2580645161290323f,
+                            0.25675675675675674f, 0.2528735632183908f, 0.17500000000000002f,
+                            0.15315315315315312f, 0.15189873417721522f,
+                            0.15789473684210534f, 0.15789473684210542f},
+                    new float[]{0.08823529411764705f, 0.19019607843137254f, 0.2431372549019608f,
+                            0.2901960784313725f, 0.3411764705882353f, 0.47058823529411764f,
+                            0.5647058823529412f, 0.6901960784313725f, 0.8137254901960784f,
+                            0.9254901960784314f}
+            ),
+            new TonalPalette(
+                    new float[]{0.050884955752212385f, 0.07254901960784313f, 0.0934640522875817f,
+                            0.10457516339869281f, 0.11699346405228758f,
+                            0.1255813953488372f, 0.1268939393939394f, 0.12533333333333332f,
+                            0.12500000000000003f, 0.12777777777777777f},
+                    new float[]{1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+                    new float[]{0.44313725490196076f, 0.5f, 0.5f, 0.5f, 0.5f, 0.5784313725490196f,
+                            0.6549019607843137f, 0.7549019607843137f, 0.8509803921568627f,
+                            0.9411764705882353f}
             )
     };
 
+    @SuppressWarnings("WeakerAccess")
+    static final ColorRange[] BLACKLISTED_COLORS = new ColorRange[] {
+
+            // Red
+            new ColorRange(
+                    new Range<>(0f, 20f) /* H */,
+                    new Range<>(0.7f, 1f) /* S */,
+                    new Range<>(0.21f, 0.79f)) /* L */,
+            new ColorRange(
+                    new Range<>(0f, 20f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.355f, 0.653f)),
+
+            // Red Orange
+            new ColorRange(
+                    new Range<>(20f, 40f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.28f, 0.643f)),
+            new ColorRange(
+                    new Range<>(20f, 40f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.414f, 0.561f)),
+            new ColorRange(
+                    new Range<>(20f, 40f),
+                    new Range<>(0f, 3f),
+                    new Range<>(0.343f, 0.584f)),
+
+            // Orange
+            new ColorRange(
+                    new Range<>(40f, 60f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.173f, 0.349f)),
+            new ColorRange(
+                    new Range<>(40f, 60f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.233f, 0.427f)),
+            new ColorRange(
+                    new Range<>(40f, 60f),
+                    new Range<>(0f, 0.3f),
+                    new Range<>(0.231f, 0.484f)),
+
+            // Yellow 60
+            new ColorRange(
+                    new Range<>(60f, 80f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.488f, 0.737f)),
+            new ColorRange(
+                    new Range<>(60f, 80f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.673f, 0.837f)),
+
+            // Yellow Green 80
+            new ColorRange(
+                    new Range<>(80f, 100f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.469f, 0.61f)),
+
+            // Yellow green 100
+            new ColorRange(
+                    new Range<>(100f, 120f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.388f, 0.612f)),
+            new ColorRange(
+                    new Range<>(100f, 120f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.424f, 0.541f)),
+
+            // Green
+            new ColorRange(
+                    new Range<>(120f, 140f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.375f, 0.52f)),
+            new ColorRange(
+                    new Range<>(120f, 140f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.435f, 0.524f)),
+
+            // Green Blue 140
+            new ColorRange(
+                    new Range<>(140f, 160f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.496f, 0.641f)),
+
+            // Seafoam
+            new ColorRange(
+                    new Range<>(160f, 180f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.496f, 0.567f)),
+
+            // Cyan
+            new ColorRange(
+                    new Range<>(180f, 200f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.52f, 0.729f)),
+
+            // Blue
+            new ColorRange(
+                    new Range<>(220f, 240f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.396f, 0.571f)),
+            new ColorRange(
+                    new Range<>(220f, 240f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.425f, 0.551f)),
+
+            // Blue Purple 240
+            new ColorRange(
+                    new Range<>(240f, 260f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.418f, 0.639f)),
+            new ColorRange(
+                    new Range<>(220f, 240f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.441f, 0.576f)),
+
+            // Blue Purple 260
+            new ColorRange(
+                    new Range<>(260f, 280f),
+                    new Range<>(0.3f, 1f), // Bigger range
+                    new Range<>(0.461f, 0.553f)),
+
+            // Fuchsia
+            new ColorRange(
+                    new Range<>(300f, 320f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.484f, 0.588f)),
+            new ColorRange(
+                    new Range<>(300f, 320f),
+                    new Range<>(0.3f, 0.7f),
+                    new Range<>(0.48f, 0.592f)),
+
+            // Pink
+            new ColorRange(
+                    new Range<>(320f, 340f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.466f, 0.629f)),
+
+            // Soft red
+            new ColorRange(
+                    new Range<>(340f, 360f),
+                    new Range<>(0.7f, 1f),
+                    new Range<>(0.437f, 0.596f))
+    };
+
+    /**
+     * Representation of an HSL color range.
+     * <ul>
+     * <li>hsl[0] is Hue [0 .. 360)</li>
+     * <li>hsl[1] is Saturation [0...1]</li>
+     * <li>hsl[2] is Lightness [0...1]</li>
+     * </ul>
+     */
+    static class ColorRange {
+        private Range<Float> mHue;
+        private Range<Float> mSaturation;
+        private Range<Float> mLightness;
+
+        ColorRange(Range<Float> hue, Range<Float> saturation, Range<Float> lightness) {
+            mHue = hue;
+            mSaturation = saturation;
+            mLightness = lightness;
+        }
+
+        boolean containsColor(float h, float s, float l) {
+            if (!mHue.contains(h)) {
+                return false;
+            } else if (!mSaturation.contains(s)) {
+                return false;
+            } else if (!mLightness.contains(l)) {
+                return false;
+            }
+            return true;
+        }
+
+        float[] getCenter() {
+            return new float[] {
+                    mHue.getLower() + (mHue.getUpper() - mHue.getLower()) / 2f,
+                    mSaturation.getLower() + (mSaturation.getUpper() - mSaturation.getLower()) / 2f,
+                    mLightness.getLower() + (mLightness.getUpper() - mLightness.getLower()) / 2f
+            };
+        }
+
+        @Override
+        public String toString() {
+            return String.format("H: %s, S: %s, L %s", mHue, mSaturation, mLightness);
+        }
+    }
+
 }