Android Color Pallet With Alpha

fun addAlphaToColor(originalColor: String, alpha: Float): String {
        val alphaFixed = (alpha * 255).roundToLong()
        var alphaHex = java.lang.Long.toHexString(alphaFixed)
        if (alphaHex.length == 1) {
            alphaHex = "0$alphaHex"
        }
        return originalColor.replace("#", "#$alphaHex")
    }

    fun getColorPalletWithAlpha(color: String, numberOfColors: Int, minAlpha: Float = 0.15f,
                                maxAlpha: Float = 1f): List<String> {

        val delta = (maxAlpha - minAlpha) / numberOfColors

        val list = mutableListOf<String>()
        for (i in 1..numberOfColors) {
            list.add(addAlphaToColor(color, i * delta))
        }

        return list
    }