Hook for drupal_get_css

The garland theme uses color.module. Both versions of style.css are being sent to the browser. This is both redundant (without css compression enabled) during development, makes firebug very awkward to use, as there are two versions of every rule.

In chatting about possible solutions, someone suggests this:

(10:25:36 AM) i'd probably suggest in it that a) drupal_get_css use theme functions for its output, and b) a bonus for some kind of hook_css_alter (although having theme functions would serve the same function)

Perhaps this has already been address in 6.x, but it would be nice if there was some patch for 5.7. If I had access to the style sheets array, in some easy hook, this would be simple.

If there's a specific workaround you can suggest now, I could really use it.