You can buy colored contacts at Walgreens, Amazon or through 1800contacts. You can have them with or without a subscription. If you are looking for non corrected colored contacts, then you do not need a subscription, but you will need the contact fitted to your eye since eyes are all different.
Currently different colored PS3s are only available in Japan. It is not likely that there will ever be different colored PS3s sold outside of Japan. It is however possible to buy PS3 controllers of various colors.
If white or black are not your thing, then you can buy a different colored skin for your Xbox 360. Not only can you get different colors, but you can get different patterns as well. The game Halo even has it's own skin to decorate your 360.
There are screws located behind the ash tray, unscrew them and pop the plastic off around the shifter, then pop out the panel where the lights are located. you can get different colored lights are discount or autozone... or you can even put the led strip lights from discount in.
It depends on how you look at it. Ornaments are mainly to make a tree prettier, so if you can still make it pretty with only lights there is no point of ornaments. Try using different colored lights on it.