gistfile1.txt

// Shorten colors from #AABBCC to #ABC. Note that we want to make sure
// the color is not preceded by either ", " or =. Indeed, the property
//     filter: chroma(color="#FFFFFF");
// would become
//     filter: chroma(color="#FFF");
// which makes the filter break in IE.

BEFORE:

var pattern = /([^"'=\s])(\s*)#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])/gi

BUG: It also compresses ids. e.g #AABBCC { ... } .foo, #AABBCC { ... }

AFTER (make sure we only pick up matches inside a { ... }:

var pattern = /([^"'=\s])(\s*)#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([^\{]*?\})/gi