Colors - Validity

Colors written as CSS writes them, checked on strings.

Theme.kt

data class Theme(
    val accent: String?,
    val overlay: String? = null
) : Validatable {
    override fun validation() = validation {
        ::accent required { hexColor() }
        ::overlay ifPresent { rgbColor() }
    }
}

Constraint	Checks
`hexColor`	Is a hexadecimal color: `#` and 3, 4, 6 or 8 hexadecimal digits, such as `#fff` or `#1a2b3c80`.
`rgbColor`	Is a CSS `rgb()` or `rgba()` color, such as `rgb(255, 0, 0)` or `rgba(0, 0, 0, 0.5)`.
`hslColor`	Is a CSS `hsl()` or `hsla()` color, such as `hsl(120, 100%, 50%)`.

`hexColor`

hexColor() on String Checks that the string is a hexadecimal color: # and 3, 4, 6 or 8 hexadecimal digits, such as #fff or #1a2b3c80. hexColor

`rgbColor`

rgbColor() on String Checks that the string is a CSS rgb() or rgba() color, such as rgb(255, 0, 0) or rgba(0, 0, 0, 0.5). Each channel is a whole number from 0 to 255, and the alpha from 0 to 1. rgbColor

`hslColor`

hslColor() on String Checks that the string is a CSS hsl() or hsla() color, such as hsl(120, 100%, 50%). The hue goes from 0 to 360, saturation and lightness from 0% to 100%, and the alpha from 0 to 1. hslColor