Material color randomizer

material_colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="white">#fafafa</color>


    <!-- RED -->
    <color name="red_50">#FFEBEE</color>
    <color name="red_100">#FFCDD2</color>
    <color name="red_200">#EF9A9A</color>
    <color name="red_300">#E57373</color>
    <color name="red_400">#EF5350</color>
    <color name="red_500">#F44336</color>
    <color name="red_600">#E53935</color>
    <color name="red_700">#D32F2F</color>
    <color name="red_800">#C62828</color>
    <color name="red_900">#B71C1C</color>
    <color name="red_a100">#FF8A80</color>
    <color name="red_a200">#FF5252</color>
    <color name="red_a400">#FF1744</color>
    <color name="red_a700">#D50000</color>

    <!-- PINK -->
    <color name="pink_50">#FCE4EC</color>
    <color name="pink_100">#F8BBD0</color>
    <color name="pink_200">#F48FB1</color>
    <color name="pink_300">#F06292</color>
    <color name="pink_400">#EC407A</color>
    <color name="pink_500">#E91E63</color>
    <color name="pink_600">#D81B60</color>
    <color name="pink_700">#C2185B</color>
    <color name="pink_800">#AD1457</color>
    <color name="pink_900">#880E4F</color>
    <color name="pink_a100">#FF80AB</color>
    <color name="pink_a200">#FF4081</color>
    <color name="pink_a400">#F50057</color>
    <color name="pink_a700">#C51162</color>

    <!-- PURPLE -->
    <color name="purple_50">#F3E5F5</color>
    <color name="purple_100">#E1BEE7</color>
    <color name="purple_200">#CE93D8</color>
    <color name="purple_300">#BA68C8</color>
    <color name="purple_400">#AB47BC</color>
    <color name="purple_500">#9C27B0</color>
    <color name="purple_600">#8E24AA</color>
    <color name="purple_700">#7B1FA2</color>
    <color name="purple_800">#6A1B9A</color>
    <color name="purple_900">#4A148C</color>
    <color name="purple_a100">#EA80FC</color>
    <color name="purple_a200">#E040FB</color>
    <color name="purple_a400">#D500F9</color>
    <color name="purple_a700">#AA00FF</color>

    <!-- DEEP PURPLE -->
    <color name="deep_purple_50">#EDE7F6</color>
    <color name="deep_purple_100">#D1C4E9</color>
    <color name="deep_purple_200">#B39DDB</color>
    <color name="deep_purple_300">#9575CD</color>
    <color name="deep_purple_400">#7E57C2</color>
    <color name="deep_purple_500">#673AB7</color>
    <color name="deep_purple_600">#5E35B1</color>
    <color name="deep_purple_700">#512DA8</color>
    <color name="deep_purple_800">#4527A0</color>
    <color name="deep_purple_900">#311B92</color>
    <color name="deep_purple_a100">#B388FF</color>
    <color name="deep_purple_a200">#7C4DFF</color>
    <color name="deep_purple_a400">#651FFF</color>
    <color name="deep_purple_a700">#6200EA</color>

    <!-- INDIGO -->
    <color name="indigo_50">#E8EAF6</color>
    <color name="indigo_100">#C5CAE9</color>
    <color name="indigo_200">#9FA8DA</color>
    <color name="indigo_300">#7986CB</color>
    <color name="indigo_400">#5C6BC0</color>
    <color name="indigo_500">#3F51B5</color>
    <color name="indigo_600">#3949AB</color>
    <color name="indigo_700">#303F9F</color>
    <color name="indigo_800">#283593</color>
    <color name="indigo_900">#1A237E</color>
    <color name="indigo_a100">#8C9EFF</color>
    <color name="indigo_a200">#536DFE</color>
    <color name="indigo_a400">#3D5AFE</color>
    <color name="indigo_a700">#304FFE</color>

    <!-- BLUE -->
    <color name="blue_50">#E3F2FD</color>
    <color name="blue_100">#BBDEFB</color>
    <color name="blue_200">#90CAF9</color>
    <color name="blue_300">#64B5F6</color>
    <color name="blue_400">#42A5F5</color>
    <color name="blue_500">#2196F3</color>
    <color name="blue_600">#1E88E5</color>
    <color name="blue_700">#1976D2</color>
    <color name="blue_800">#1565C0</color>
    <color name="blue_900">#0D47A1</color>
    <color name="blue_a100">#82B1FF</color>
    <color name="blue_a200">#448AFF</color>
    <color name="blue_a400">#2979FF</color>
    <color name="blue_a700">#2962FF</color>

    <!-- LIGHT BLUE -->
    <color name="light_blue_50">#E1F5FE</color>
    <color name="light_blue_100">#B3E5FC</color>
    <color name="light_blue_200">#81D4FA</color>
    <color name="light_blue_300">#4FC3F7</color>
    <color name="light_blue_400">#29B6F6</color>
    <color name="light_blue_500">#03A9F4</color>
    <color name="light_blue_600">#039BE5</color>
    <color name="light_blue_700">#0288D1</color>
    <color name="light_blue_800">#0277BD</color>
    <color name="light_blue_900">#01579B</color>
    <color name="light_blue_a100">#80D8FF</color>
    <color name="light_blue_a200">#40C4FF</color>
    <color name="light_blue_a400">#00B0FF</color>
    <color name="light_blue_a700">#0091EA</color>

    <!-- CYAN -->
    <color name="cyan_50">#E0F7FA</color>
    <color name="cyan_100">#B2EBF2</color>
    <color name="cyan_200">#80DEEA</color>
    <color name="cyan_300">#4DD0E1</color>
    <color name="cyan_400">#26C6DA</color>
    <color name="cyan_500">#00BCD4</color>
    <color name="cyan_600">#00ACC1</color>
    <color name="cyan_700">#0097A7</color>
    <color name="cyan_800">#00838F</color>
    <color name="cyan_900">#006064</color>
    <color name="cyan_a100">#84FFFF</color>
    <color name="cyan_a200">#18FFFF</color>
    <color name="cyan_a400">#00E5FF</color>
    <color name="cyan_a700">#00B8D4</color>

    <!-- TEAL -->
    <color name="teal_50">#E0F2F1</color>
    <color name="teal_100">#B2DFDB</color>
    <color name="teal_200">#80CBC4</color>
    <color name="teal_300">#4DB6AC</color>
    <color name="teal_400">#26A69A</color>
    <color name="teal_500">#009688</color>
    <color name="teal_600">#00897B</color>
    <color name="teal_700">#00796B</color>
    <color name="teal_800">#00695C</color>
    <color name="teal_900">#004D40</color>
    <color name="teal_a100">#A7FFEB</color>
    <color name="teal_a200">#64FFDA</color>
    <color name="teal_a400">#1DE9B6</color>
    <color name="teal_a700">#00BFA5</color>

    <!-- GREEN -->
    <color name="green_50">#E8F5E9</color>
    <color name="green_100">#C8E6C9</color>
    <color name="green_200">#A5D6A7</color>
    <color name="green_300">#81C784</color>
    <color name="green_400">#66BB6A</color>
    <color name="green_500">#4CAF50</color>
    <color name="green_600">#43A047</color>
    <color name="green_700">#388E3C</color>
    <color name="green_800">#2E7D32</color>
    <color name="green_900">#1B5E20</color>
    <color name="green_a100">#B9F6CA</color>
    <color name="green_a200">#69F0AE</color>
    <color name="green_a400">#00E676</color>
    <color name="green_a700">#00C853</color>

    <!-- LIGHT GREEN -->
    <color name="light_green_50">#F1F8E9</color>
    <color name="light_green_100">#DCEDC8</color>
    <color name="light_green_200">#C5E1A5</color>
    <color name="light_green_300">#AED581</color>
    <color name="light_green_400">#9CCC65</color>
    <color name="light_green_500">#8BC34A</color>
    <color name="light_green_600">#7CB342</color>
    <color name="light_green_700">#689F38</color>
    <color name="light_green_800">#558B2F</color>
    <color name="light_green_900">#33691E</color>
    <color name="light_green_a100">#CCFF90</color>
    <color name="light_green_a200">#B2FF59</color>
    <color name="light_green_a400">#76FF03</color>
    <color name="light_green_a700">#64DD17</color>

    <!-- LIME -->
    <color name="lime_50">#F9FBE7</color>
    <color name="lime_100">#F0F4C3</color>
    <color name="lime_200">#E6EE9C</color>
    <color name="lime_300">#DCE775</color>
    <color name="lime_400">#D4E157</color>
    <color name="lime_500">#CDDC39</color>
    <color name="lime_600">#C0CA33</color>
    <color name="lime_700">#AFB42B</color>
    <color name="lime_800">#9E9D24</color>
    <color name="lime_900">#827717</color>
    <color name="lime_a100">#F4FF81</color>
    <color name="lime_a200">#EEFF41</color>
    <color name="lime_a400">#C6FF00</color>
    <color name="lime_a700">#AEEA00</color>

    <!-- YELLOW -->
    <color name="yellow_50">#FFFDE7</color>
    <color name="yellow_100">#FFF9C4</color>
    <color name="yellow_200">#FFF59D</color>
    <color name="yellow_300">#FFF176</color>
    <color name="yellow_400">#FFEE58</color>
    <color name="yellow_500">#FFEB3B</color>
    <color name="yellow_600">#FDD835</color>
    <color name="yellow_700">#FBC02D</color>
    <color name="yellow_800">#F9A825</color>
    <color name="yellow_900">#F57F17</color>
    <color name="yellow_a100">#FFFF8D</color>
    <color name="yellow_a200">#FFFF00</color>
    <color name="yellow_a400">#FFEA00</color>
    <color name="yellow_a700">#FFD600</color>

    <!-- AMBER -->
    <color name="amber_50">#FFF8E1</color>
    <color name="amber_100">#FFECB3</color>
    <color name="amber_200">#FFE082</color>
    <color name="amber_300">#FFD54F</color>
    <color name="amber_400">#FFCA28</color>
    <color name="amber_500">#FFC107</color>
    <color name="amber_600">#FFB300</color>
    <color name="amber_700">#FFA000</color>
    <color name="amber_800">#FF8F00</color>
    <color name="amber_900">#FF6F00</color>
    <color name="amber_a100">#FFE57F</color>
    <color name="amber_a200">#FFD740</color>
    <color name="amber_a400">#FFC400</color>
    <color name="amber_a700">#FFAB00</color>

    <!-- ORANGE -->
    <color name="orange_50">#FFF3E0</color>
    <color name="orange_100">#FFE0B2</color>
    <color name="orange_200">#FFCC80</color>
    <color name="orange_300">#FFB74D</color>
    <color name="orange_400">#FFA726</color>
    <color name="orange_500">#FF9800</color>
    <color name="orange_600">#FB8C00</color>
    <color name="orange_700">#F57C00</color>
    <color name="orange_800">#EF6C00</color>
    <color name="orange_900">#E65100</color>
    <color name="orange_a100">#FFD180</color>
    <color name="orange_a200">#FFAB40</color>
    <color name="orange_a400">#FF9100</color>
    <color name="orange_a700">#FF6D00</color>

    <!-- DEEP ORANGE -->
    <color name="deep_orange_50">#FBE9E7</color>
    <color name="deep_orange_100">#FFCCBC</color>
    <color name="deep_orange_200">#FFAB91</color>
    <color name="deep_orange_300">#FF8A65</color>
    <color name="deep_orange_400">#FF7043</color>
    <color name="deep_orange_500">#FF5722</color>
    <color name="deep_orange_600">#F4511E</color>
    <color name="deep_orange_700">#E64A19</color>
    <color name="deep_orange_800">#D84315</color>
    <color name="deep_orange_900">#BF360C</color>
    <color name="deep_orange_a100">#FF9E80</color>
    <color name="deep_orange_a200">#FF6E40</color>
    <color name="deep_orange_a400">#FF3D00</color>
    <color name="deep_orange_a700">#DD2C00</color>

    <!-- BROWN -->
    <color name="brown_50">#EFEBE9</color>
    <color name="brown_100">#D7CCC8</color>
    <color name="brown_200">#BCAAA4</color>
    <color name="brown_300">#A1887F</color>
    <color name="brown_400">#8D6E63</color>
    <color name="brown_500">#795548</color>
    <color name="brown_600">#6D4C41</color>
    <color name="brown_700">#5D4037</color>
    <color name="brown_800">#4E342E</color>
    <color name="brown_900">#3E2723</color>

    <!-- GREY -->
    <color name="grey_50">#FAFAFA</color>
    <color name="grey_100">#F5F5F5</color>
    <color name="grey_200">#EEEEEE</color>
    <color name="grey_300">#E0E0E0</color>
    <color name="grey_400">#BDBDBD</color>
    <color name="grey_500">#9E9E9E</color>
    <color name="grey_600">#757575</color>
    <color name="grey_700">#616161</color>
    <color name="grey_800">#424242</color>
    <color name="grey_900">#212121</color>
    <color name="black">#000000</color>

    <!-- BLUE GREY -->
    <color name="blue_grey_50">#ECEFF1</color>
    <color name="blue_grey_100">#CFD8DC</color>
    <color name="blue_grey_200">#B0BEC5</color>
    <color name="blue_grey_300">#90A4AE</color>
    <color name="blue_grey_400">#78909C</color>
    <color name="blue_grey_500">#607D8B</color>
    <color name="blue_grey_600">#546E7A</color>
    <color name="blue_grey_700">#455A64</color>
    <color name="blue_grey_800">#37474F</color>
    <color name="blue_grey_900">#263238</color>
</resources>

MaterialColorRandomizer.java

/**
 * Created by nikola on 11/14/14.
 */
public class MaterialColorRandomizer {
    private Shade mNuance;
    private Context mContext;

    private MaterialColorRandomizer(Context context) {
        mContext = context;
    }

    public static MaterialColorRandomizer getInstance(Context context) {
        return new MaterialColorRandomizer(context);
    }
    public MaterialColorRandomizer ofShade(Shade nuance){
        mNuance = nuance;
        return this;
    }
    public int getRandomColorShade(){
        boolean shouldUseConstantNuance = true;
        if(mNuance == null){
            shouldUseConstantNuance = false;
            mNuance = getRandomNuance();
        }
        int[] shadesOf = mContext.getResources().getIntArray(mNuance.getResId());
        if(!shouldUseConstantNuance)
                  mNuance = null;
        return shadesOf[getRandom(shadesOf.length)];
    }

    private Shade getRandomNuance() {
        return Shade.values()[getRandom(Shade.values().length)];
    }
    private int getRandom(int within){
        Random random = new Random();
        return random.nextInt(within);
    }
    public enum Shade{
        RED(R.array.reds),
        PINK(R.array.pinks),
        PURPLE(R.array.purples),
        DEEP_PURPLE(R.array.deep_purples), // not the band
        BLUE(R.array.blues),
        LIGHT_BLUE(R.array.light_blues),
        CYAN(R.array.cyans),
        TEAL(R.array.teals),
        GREEN(R.array.greens),
        LIGHT_GREEN(R.array.light_greens),
        LIME(R.array.limes),
        YELLOW(R.array.yellows),
        AMBER(R.array.ambers),
        ORANGE(R.array.oranges),
        DEEP_ORANGE(R.array.deep_oranges),
        BROWN(R.array.browns),
        GREY(R.array.greys),
        BLUE_GREY(R.array.blue_greys);

        public int getResId() {
            return mResId;
        }

        private final int mResId;

        Shade(int rs) {
            mResId = rs;
        }
    }
}