As the first game of the Final Four in Houston's Reliant Stadium approaches, here's an article/photo essay on the conversion of the stadium surface to a basketball court. Here's a video of the same. The out-of-bounds areas are definitely blue, in the NCAA's boring format. I'm assuming Houston's space-based Final Four logo (almost like the baseball Astros' old design) will be at center court, with the standard open key and blue top-of-the-key semicircle. Here's an article on the manufacturing of the men's and women's Final Four floors.
UPDATE: The court looks pretty much as I expected, except the dominant color appears to be a darker shade of blue than in the earlier rounds. In a few areas of the out-of-bounds area, the blue fades to a lighter shade to form a backdrop for white lettering ("FINAL FOUR" in the out-of-bounds areas behind the baskets, "NCAA" by the check-in point at the scorer's table, and the phrase "AND THEN THERE WERE FOUR, THREE, TWO, ONE" on the opposite side of the court from the scorer's table).