Some people love color and Steelseries has some new computer caps than can enhance the color of your keyboard. Prismcaps are universal key caps that allow for some color to come out from the sides and the top. From the pictures, you can see how the color can spread out all over the keyboard from this design.
They are made to be compatible with a lot of keyboards and of course, their own line. Your mileage will vary depending on the brand of keyboard you have. The kit comes with a cap puller to help you easily change the them out.
There are three layouts to choose from so depending on the region you reside in, you can order one that suits your needs. They'll set you back $29.99 and come in both white and black and can be ordered here.