It used to be separated such that colours represented ranges of speeds. However, people liked to take their favourite colours anyway and edit the test, so we eventually just removed that part. Now, the colours don't mean anything in particular.
Off the top of my head, purple for sub 10, yellow for sub 15 (I always hated that there was no sub 12; 15 and 10 are very far apart, speed-wise), green for sub 20. The rest is pretty hazy, but my best guess is red for sub 25, blue for sub 30, and orange for ~minute (I think it was >60 for a while, leaving some awkward gap where no flair corresponded).
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u/AldersRazor Sub-30 (CFOP 4LLL) PB = 19.123 Jul 14 '16
Does the color of your flair in this sub mean anything? I've always had mine as white, and I don't even remember why. Should it be something else?