Colors are items in Club Penguin Rewritten that when worn, will change the color of your penguin. When creating an account, the player gets to pick one color for free. Further colors can be bought from the Penguin Style catalog for 20 coins each. Unlike other clothing items, they cannot be removed from the Player Card. There are currently 18 released colors.
Some colors can only be worn by mascots or not be worn at all. This used to be true for Ocean Blue, a test color that was worn by Gary the Gadget Guy until it was made available to players.