I think this is very cool, keyboards that can change the color skins, and brightness according to your need and mood. Luxiium, a Korean company, offers the Luxeed, a white or black keyboard with LED keys.

The custom colors are selectable for each key, and you can also create color skins for the keyboard so that you can switch skins for a game and then change back to your normal colors for regular usage. It looks like the whole key lights up in the white version, whereas in the black, only the letter itself lights up. Very slick!