export function hexToHSL(hex: string) {
	let result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)

	if(!result) {
		return null
	}

	let r = parseInt(result[1], 16)
	let g = parseInt(result[2], 16)
	let b = parseInt(result[3], 16)

	r /= 255
	g /= 255
	b /= 255

	let max = Math.max(r, g, b)
	let min = Math.min(r, g, b)

	let h = 0
	let s = 0
	let l = (max + min) / 2

	if(max == min) {
		h = s = 0
	} else {
		let d = max - min
		s = l > 0.5 ? d / (2 - max - min) : d / (max + min)

		switch(max) {
			case r:
				h = (g - b) / d + (g < b ? 6 : 0)
				break
			case g:
				h = (b - r) / d + 2
				break
			case b:
				h = (r - g) / d + 4
				break
		}

		h /= 6
	}

	return {h, s, l}
}