BlueTech Cool LED ILLUMINATED Gaming Keyboard for Microsoft Windows 8, 7, Vista, or XP - Apple Mac, PC, Linux 3 Color Backlighting Blue, Red, and Purple If you are looking for a well-built keyboard with backlighting that isn't overpriced and doesn't feel cheap, then this is what you want. The keys are sensitive and responsive, with just the right spring-back to let you know they're there. Typing on this keyboard feels fluid and simple. The keys are arranged well. Every key is well-lit and easy to read. You are getting your money's worth. The lighting can be adjusted between red, blue, and purple, and the light itself can be adjusted to be off, low, high, or slowly pulsing. TO CHANGE THE COLOR YOU HOLD FN AND NUMBER 5 ON THE LEFT: and if you use the FN key with a 2 it dims and other numbers cause it to turn off or go from light to dark and back.