Larry's favorite color is, without a doubt, Blue. He's a sucker for a good azure.
However, if he's being completely honest, he also has a soft spot for Yellow. It's a bit garish, but he can't help it.
But let's not forget Magenta! It's a bit much, but he loves it.
You can find more of Larry's favorite colors on the Larry's Favorite Paints page.
Or, if you're feeling really adventurous, check out Larry's Favorite Memes.