NSColor / UIColor mapping

[jeffh]

Various mapper ideas:

{red: 255, green: 255, blue: 255}
{red: 255, green: 255, blue: 255, alpha: 255}
{hue: 255, saturation: 255, brightness: 255, alpha: 255}
"#aabbcc"
"aabbcc"
"#aabbccdd"
"aabbccdd"
"#abc"
"abc"
"#abcd"
"abcd"
[255, 255, 255]
[255, 255, 255, 255]
0xabc
0xaabbcc
0xaabbccdd