Microsoft's SideWinder X4 is a low-cost, backlit, gaming keyboard, and one of the very few to feature anti-ghosting technology that isn't limited to some small region of the keyboard. Typically, this feature has only been available on very high-end keyboards. This has made the X4 a hit with budget-minded gamers.
Unfortunately, not everyone loves the color of the backlighting. The X4 features a brilliant red backlight. But many people prefer blue, or even green. In this Instructable, I will show you how easy and inexpensive it is to change the backlighting to a different color. Please note that doing this will void your warranty.
Step 1: Gather Materials
They also have a U.S. distributor:
Shipping will probably cost far more than the handful of LEDs, so you might want to stock up, or do a joint buy with firends. You will need at least 10 LEDs of your choosen color. I would buy some extra in case you break or lose some.