Material Design colors palette in Kotlin

MaterialColor.kt

package pl.info.czerwinski

enum class MaterialColor(val tones: Map<Int, Int> = emptyMap(), val accentTones: Map<Int, Int> = emptyMap(), val singleColor: Int? = null) {
	RED(
			tones = mapOf(
					50 to 0xFFEBEE,
					100 to 0xFFCDD2,
					200 to 0xEF9A9A,
					300 to 0xE57373,
					400 to 0xEF5350,
					500 to 0xF44336,
					600 to 0xE53935,
					700 to 0xD32F2F,
					800 to 0xC62828,
					900 to 0xB71C1C
			),
			accentTones = mapOf(
					100 to 0xFF8A80,
					200 to 0xFF5252,
					400 to 0xFF1744,
					700 to 0xD50000
			)
	),
	PINK(
			tones = mapOf(
					50 to 0xFCE4EC,
					100 to 0xF8BBD0,
					200 to 0xF48FB1,
					300 to 0xF06292,
					400 to 0xEC407A,
					500 to 0xE91E63,
					600 to 0xD81B60,
					700 to 0xC2185B,
					800 to 0xAD1457,
					900 to 0x880E4F
			),
			accentTones = mapOf(
					100 to 0xFF80AB,
					200 to 0xFF4081,
					400 to 0xF50057,
					700 to 0xC51162
			)
	),
	PURPLE(
			tones = mapOf(
					50 to 0xF3E5F5,
					100 to 0xE1BEE7,
					200 to 0xCE93D8,
					300 to 0xBA68C8,
					400 to 0xAB47BC,
					500 to 0x9C27B0,
					600 to 0x8E24AA,
					700 to 0x7B1FA2,
					800 to 0x6A1B9A,
					900 to 0x4A148C
			),
			accentTones = mapOf(
					100 to 0xEA80FC,
					200 to 0xE040FB,
					400 to 0xD500F9,
					700 to 0xAA00FF
			)
	),
	DEEP_PURPLE(
			tones = mapOf(
					50 to 0xEDE7F6,
					100 to 0xD1C4E9,
					200 to 0xB39DDB,
					300 to 0x9575CD,
					400 to 0x7E57C2,
					500 to 0x673AB7,
					600 to 0x5E35B1,
					700 to 0x512DA8,
					800 to 0x4527A0,
					900 to 0x311B92
			),
			accentTones = mapOf(
					100 to 0xB388FF,
					200 to 0x7C4DFF,
					400 to 0x651FFF,
					700 to 0x6200EA
			)
	),
	INDIGO(
			tones = mapOf(
					50 to 0xE8EAF6,
					100 to 0xC5CAE9,
					200 to 0x9FA8DA,
					300 to 0x7986CB,
					400 to 0x5C6BC0,
					500 to 0x3F51B5,
					600 to 0x3949AB,
					700 to 0x303F9F,
					800 to 0x283593,
					900 to 0x1A237E
			),
			accentTones = mapOf(
					100 to 0x8C9EFF,
					200 to 0x536DFE,
					400 to 0x3D5AFE,
					700 to 0x304FFE
			)
	),
	BLUE(
			tones = mapOf(
					50 to 0xE3F2FD,
					100 to 0xBBDEFB,
					200 to 0x90CAF9,
					300 to 0x64B5F6,
					400 to 0x42A5F5,
					500 to 0x2196F3,
					600 to 0x1E88E5,
					700 to 0x1976D2,
					800 to 0x1565C0,
					900 to 0x0D47A1
			),
			accentTones = mapOf(
					100 to 0x82B1FF,
					200 to 0x448AFF,
					400 to 0x2979FF,
					700 to 0x2962FF
			)
	),
	LIGHT_BLUE(
			tones = mapOf(
					50 to 0xE1F5FE,
					100 to 0xB3E5FC,
					200 to 0x81D4FA,
					300 to 0x4FC3F7,
					400 to 0x29B6F6,
					500 to 0x03A9F4,
					600 to 0x039BE5,
					700 to 0x0288D1,
					800 to 0x0277BD,
					900 to 0x01579B
			),
			accentTones = mapOf(
					100 to 0x80D8FF,
					200 to 0x40C4FF,
					400 to 0x00B0FF,
					700 to 0x0091EA
			)
	),
	CYAN(
			tones = mapOf(
					50 to 0xE0F7FA,
					100 to 0xB2EBF2,
					200 to 0x80DEEA,
					300 to 0x4DD0E1,
					400 to 0x26C6DA,
					500 to 0x00BCD4,
					600 to 0x00ACC1,
					700 to 0x0097A7,
					800 to 0x00838F,
					900 to 0x006064
			),
			accentTones = mapOf(
					100 to 0x84FFFF,
					200 to 0x18FFFF,
					400 to 0x00E5FF,
					700 to 0x00B8D4
			)
	),
	TEAL(
			tones = mapOf(
					50 to 0xE0F2F1,
					100 to 0xB2DFDB,
					200 to 0x80CBC4,
					300 to 0x4DB6AC,
					400 to 0x26A69A,
					500 to 0x009688,
					600 to 0x00897B,
					700 to 0x00796B,
					800 to 0x00695C,
					900 to 0x004D40
			),
			accentTones = mapOf(
					100 to 0xA7FFEB,
					200 to 0x64FFDA,
					400 to 0x1DE9B6,
					700 to 0x00BFA5
			)
	),
	GREEN(
			tones = mapOf(
					50 to 0xE8F5E9,
					100 to 0xC8E6C9,
					200 to 0xA5D6A7,
					300 to 0x81C784,
					400 to 0x66BB6A,
					500 to 0x4CAF50,
					600 to 0x43A047,
					700 to 0x388E3C,
					800 to 0x2E7D32,
					900 to 0x1B5E20
			),
			accentTones = mapOf(
					100 to 0xB9F6CA,
					200 to 0x69F0AE,
					400 to 0x00E676,
					700 to 0x00C853
			)
	),
	LIGHT_GREEN(
			tones = mapOf(
					50 to 0xF1F8E9,
					100 to 0xDCEDC8,
					200 to 0xC5E1A5,
					300 to 0xAED581,
					400 to 0x9CCC65,
					500 to 0x8BC34A,
					600 to 0x7CB342,
					700 to 0x689F38,
					800 to 0x558B2F,
					900 to 0x33691E
			),
			accentTones = mapOf(
					100 to 0xCCFF90,
					200 to 0xB2FF59,
					400 to 0x76FF03,
					700 to 0x64DD17
			)
	),
	LIME(
			tones = mapOf(
					50 to 0xF9FBE7,
					100 to 0xF0F4C3,
					200 to 0xE6EE9C,
					300 to 0xDCE775,
					400 to 0xD4E157,
					500 to 0xCDDC39,
					600 to 0xC0CA33,
					700 to 0xAFB42B,
					800 to 0x9E9D24,
					900 to 0x827717
			),
			accentTones = mapOf(
					100 to 0xF4FF81,
					200 to 0xEEFF41,
					400 to 0xC6FF00,
					700 to 0xAEEA00
			)
	),
	YELLOW(
			tones = mapOf(
					50 to 0xFFFDE7,
					100 to 0xFFF9C4,
					200 to 0xFFF59D,
					300 to 0xFFF176,
					400 to 0xFFEE58,
					500 to 0xFFEB3B,
					600 to 0xFDD835,
					700 to 0xFBC02D,
					800 to 0xF9A825,
					900 to 0xF57F17
			),
			accentTones = mapOf(
					100 to 0xFFFF8D,
					200 to 0xFFFF00,
					400 to 0xFFEA00,
					700 to 0xFFD600
			)
	),
	AMBER(
			tones = mapOf(
					50 to 0xFFF8E1,
					100 to 0xFFECB3,
					200 to 0xFFE082,
					300 to 0xFFD54F,
					400 to 0xFFCA28,
					500 to 0xFFC107,
					600 to 0xFFB300,
					700 to 0xFFA000,
					800 to 0xFF8F00,
					900 to 0xFF6F00
			),
			accentTones = mapOf(
					100 to 0xFFE57F,
					200 to 0xFFD740,
					400 to 0xFFC400,
					700 to 0xFFAB00
			)
	),
	ORANGE(
			tones = mapOf(
					50 to 0xFFF3E0,
					100 to 0xFFE0B2,
					200 to 0xFFCC80,
					300 to 0xFFB74D,
					400 to 0xFFA726,
					500 to 0xFF9800,
					600 to 0xFB8C00,
					700 to 0xF57C00,
					800 to 0xEF6C00,
					900 to 0xE65100
			),
			accentTones = mapOf(
					100 to 0xFFD180,
					200 to 0xFFAB40,
					400 to 0xFF9100,
					700 to 0xFF6D00
			)
	),
	DEEP_ORANGE(
			tones = mapOf(
					50 to 0xFBE9E7,
					100 to 0xFFCCBC,
					200 to 0xFFAB91,
					300 to 0xFF8A65,
					400 to 0xFF7043,
					500 to 0xFF5722,
					600 to 0xF4511E,
					700 to 0xE64A19,
					800 to 0xD84315,
					900 to 0xBF360C
			),
			accentTones = mapOf(
					100 to 0xFF9E80,
					200 to 0xFF6E40,
					400 to 0xFF3D00,
					700 to 0xDD2C0
			)
	),
	BROWN(
			tones = mapOf(
					50 to 0xEFEBE9,
					100 to 0xD7CCC8,
					200 to 0xBCAAA4,
					300 to 0xA1887F,
					400 to 0x8D6E63,
					500 to 0x795548,
					600 to 0x6D4C41,
					700 to 0x5D4037,
					800 to 0x4E342E,
					900 to 0x3E2723
			)
	),
	GREY(
			tones = mapOf(
					50 to 0xFAFAFA,
					100 to 0xF5F5F5,
					200 to 0xEEEEEE,
					300 to 0xE0E0E0,
					400 to 0xBDBDBD,
					500 to 0x9E9E9E,
					600 to 0x757575,
					700 to 0x616161,
					800 to 0x424242,
					900 to 0x212121
			)
	),
	BLUE_GREY(
			tones = mapOf(
					50 to 0xECEFF1,
					100 to 0xCFD8DC,
					200 to 0xB0BEC5,
					300 to 0x90A4AE,
					400 to 0x78909C,
					500 to 0x607D8B,
					600 to 0x546E7A,
					700 to 0x455A64,
					800 to 0x37474F,
					900 to 0x263238
			)
	),
	BLACK(singleColor = COLOR_BLACK),
	WHITE(singleColor = COLOR_WHITE);

	val accent = object {
		operator fun get(tone: Int): Int = singleColor ?: getAccent(tone) ?: getTone(tone) ?: COLOR_BLACK
		operator fun invoke(): Int = singleColor ?: getAccent(400) ?: getTone(500) ?: COLOR_BLACK
	}

	operator fun get(tone: Int): Int = singleColor ?: getTone(tone) ?: COLOR_BLACK
	operator fun invoke(): Int = singleColor ?: getTone(500) ?: COLOR_BLACK

	private fun getTone(tone: Int): Int? =
			if (tones.isEmpty()) null
			else tones[tone] ?: interpolate(tones, tone)

	private fun getAccent(tone: Int): Int? =
			if (accentTones.isEmpty()) null
			else accentTones[tone] ?: interpolate(accentTones, tone)

	private fun interpolate(tones: Map<Int, Int>, tone: Int): Int {
		val lowTone = tones.keys.filter { tone >= it }.max() ?: 0
		val highTone = tones.keys.filter { tone <= it }.min() ?: 1000
		val lowColor = tones[lowTone] ?: COLOR_WHITE
		val highColor = tones[highTone] ?: COLOR_BLACK
		return colorInt(
				interpolateChannel(lowTone, highTone, tone, lowColor.red(), highColor.red()),
				interpolateChannel(lowTone, highTone, tone, lowColor.green(), highColor.green()),
				interpolateChannel(lowTone, highTone, tone, lowColor.blue(), highColor.blue()))
	}

	private fun interpolateChannel(lowTone: Int, highTone: Int, tone: Int, lowValue: Int, highValue: Int): Int =
			(lowValue * (highTone - tone) + highValue * (tone - lowTone)) / (highTone - lowTone)
}

private val COLOR_BLACK = 0x000000
private val COLOR_WHITE = 0xFFFFFF

fun Int.red() = (this and 0xFF0000) ushr 16
fun Int.green() = (this and 0x00FF00) ushr 8
fun Int.blue() = this and 0x0000FF

private fun colorInt(red: Int, green: Int, blue: Int) = (red shl 16) + (green shl 8) + blue