For the lack of ergo clears, browns for the alphas and then clears for the mods so the larger keys feel heavier.
Tactile grey space bar to go with the tactile alphas.
Tactile grey for the Escape so you can hammer down on it with passion.
Tactile grey again for the win keys so they are heavy and not accidentally pressed.
Green switches in the lock keys (Caps Lock, Scroll Lock, and Num Lock)...basically if you hit the Caps Lock by accident you will hear a click if you don't notice the indicator LED or the case chaNGING WHEN YOU TYPE.
Green switches on the Enter and Return so you can happily mash it on input and receive a satisfactory click.
Blue switches for the numpad since it will help in data entry...you know you pressed a key when you hear the click.
Blue switches for the arrow keys too so there's a pleasant auditory response while you navigate.
White switches for Insert and Delete for the soft click feedback when actuating.
White switches too for Page Up and Down for the soft click feedback while navigating documents and then blue switches for Home and End so there's a bigger click when they are pressed.
Linear switches for the F keys in increasing weight...red for F1-F4, black for F5-F8, and linear grey for F9-F12.
Black switches for Print Screen, and Pause Break.
Lastly, white switches for the 4 app keys in the upper right.