Here is an aerial shot of California's stadium. You'll notice a lot more red shirts than gold shirts. No, Cal isn't staging a "RED OUT" or "SCARLET OUT" or "BLOOD OUT" or whatever; Ohio State's just in town.
This doesn't even look like real life. We know there are other, more mind-altering things to do in Berkeley, but if Ohio State wins and Cal's not careful, the Buckeye faithful just might take the goalposts with them back to Columbus.