Download openrgb ( thanks to adam honse for this much needed software).

Razer cynosa v2 change color. Up to two custom colors can be added. Go to windows device manager and click the arrow next to “universal serial bus controllers”. Select the razer peripheral you want to change the color or effect of.

Press + < c> keys to cycle through the available backlight colors. I usually connect the keyboard to my xbox and the settings i've saved on my computer is not being stored. Change the lighting effect and color of the razer keyboard to your liking.

White, red, green and blue are active by default; Just bought cynosa and i really like it. To change the keyboard backlight color:

Select your razer keyboard from the device list.