Japanese Company Softclaws has started to market colored nail caps for Cats.

Sounds crazy at first, but then sounds still better than the nasty nail pulling that is still done to Cats to protect the oh so valueable furniture.

Soft Claws are attached to a cat's claws by putting a small amount of adhesive inside the caps and sliding them over the claw. I still would not do that to my Cat.
The Soft Claws come in 5 colors including very the natural looking pink and blue - Your Cat will just love it. The caps fall off with the natural growth of a cat's claws every 4-6 weeks.
More details at SoftClaws and Nikkei Net.