Here's the creator's explanation, in his own (poorly written) words. It was all just a prank, for some unknown reason!
I am sorry if you beleived it. It was a really bad attempt. You all are smart people. I never planned on it getting this big. But it did. (Come one, I know the Google logo. I am actually a graphic designer, I just wanted to see reactions if it was a crappy back.)
Oh, right, I also DO know CSS and HTML. Just clarifying that. I never was going to let this go on longer than 12 hours.
We're mostly just disappointed, since a more professional mockup would've been so much harder to disprove. Couldn't he have waited one day and gotten the damn Google colors right? [Faker's Blog via PC Mag]