Other than having a static backlight color of your choice, you can also choose to have the colors flow from side to side in a wave pattern, spectrum cycling that goes through all the colors, breathing mode, where the keyboard slowly fades in and out of any two colors of your choice, reactive mode, where the keys only light up when you press them, or template mode, where you can choose from presets such as FPS, MMO, RTS, and even some games such as DOTA 2, CS:GO, LoL, and StarCraft II and the keyboard will only light up the relevant keys for that genre or game.

Whereas the BlackWidow Ultimate has a standard green backlight, the Chroma ups the ante with a multi-color backlight that can display the full RGB spectrum of colors, with 16.8 million possible combinations, if Razer is to be believed. The first of the lot is the BlackWidow Ultimate Chroma, which is basically identical to the standard BlackWidow Ultimate, except for the backlighting. Razer has announced a new series of peripherals called Chroma, which is essentially some of its existing products with a multi-color backlight option.

Razer blackwidow ultimate change color