Just got my Keycool 84 2S in today.
RGB is all presets. For solid colors, your options are red, green, blue, yellow, purple (lavender), cyan, and white, and none (off). Everything else -as far as I can tell- is just some kind of typical rainbow effect. I am very happy with just being able to set it to white. There are 5 brightness levels, and the LEDs are as bright as the DREVO Gramr 84, and much brighter than its predecessor: the Keycool...