Function rgbToHsl

rgbToHsl(rgb: Color): Color
Convert from RGB to HSL color.
Parameters
- rgb: Color
  RGB color, [r,g,b] tuple of integers 0 <= r,g,b <= 255
Returns Color
HSL color, [h,s,l] tuple of numbers 0 <= h < 360 and 0 <= s,l <= 1