Function setFromColorInput

Parse any supported color input and write the result into out. Returns out.

Supported inputs:

• CSS hex strings: '#f00', '#ff0000'
• CSS rgb(): 'rgb(255, 0, 0)', 'rgb(100%, 0%, 0%)'
• CSS hsl(): 'hsl(0, 100%, 50%)'
• 0xRRGGBB integers: 0xff0000 (sRGB gamma)
• Named CSS colors: 'red', 'lime', 'deepskyblue', ...
• [r, g, b] array: treated as already-linear [0, 1]