What's your sign?

What's with all those new real-estate signs? Berkshire Hathaway (Warren Buffett is the chairman) bought Fox & Roach, which has become part of "Berkshire Hathaway HomeServices." Seemingly overnight all those blue-and-white Fox & Roach "For Sale" signs have been replaced by maroon ones. This must've been a boon for sign-makers, printers of stationery and business cards, and press-release writers.