Color format globbing

[kayex]

We should remain accommodating to color strings with foreign characters that have been included by accident, which is especially common when copying colors from a CSS stylesheet or other source code.

This color string should parse, despite having both a colon and space prefixed and a semicolon suffixed: ": #fff;".

In addition to this, we should be flexible in the format requirements of the respective color types, for example, we should support both the full and shorthand hexadecimal color format (i.e. both #ffffff and #fff)

Valid hex color formats

#fff
fff
ffffff

Valid RGB color formats

rgb(255,255,255)
rgba(255, 255, 255, 1.0)
rgba(255,255,255,1.0)
rgba(255,255,255,1)
(255, 255, 255)
(255,255,255)
255, 255, 255
255,255,255
255 255 255