Function rgb2hsl

rgb2hsl(r: number, g: number, b: number): number[]
in: r,g,b in [0,1], out: h in [0,360) and s,l in [0,1]
Parameters
- r: number
- g: number
- b: number
Returns number[]
See
https://stackoverflow.com/a/54071699
- Defined in source/graphics/color.ts:35