Ooohhh I will have to look into this. I use a layout style that I have never seen on any other sets, made it up from different colour caps of the same profile and dyed the ones I could not have in colour.
Looks like this on the purple (Team Qirex/Decpticon) board:
Broke the keys into colour groups loosely based on their functions. Alphas are white, Number row is purple as is the bottom row for framing reasons, Punctuation and modifiers are in black. So even with all blank keys it is easy to tell what is where. and looks nice with a consistent style of the colours shooting through the board and framing the sections, unlike regular two tone sets where the majority are all the same colour and the modifiers on the side are another with a few function keys in the middle alternated too, fine really i have a set in that style but just a bit too disjointed for me.
The yellow (Boarderlands) board in the fist picture was the first run of this layout style and had a lot more of the center of the board one colour including the punctuation in the yellow keys. After I made the purple one I redid some of the yellow board to incorporate some of the changes that made the most sense style wise and in regards to ease of use and position awareness. I added in two punctuation keys in white to maintain the angle on either side of the yellow alphas but due to doing this with solely left over caps ran out of white so finished off the break up with they grey joining the top and bottom bars, both looking correct in the over all style I was going for and providing the usability function of differentiating the other punctuation keys from the alphas.
So in all it has gone through three refinements with v2 & 3 both being final states for their respective boards as I like the colour breakdown of both and they provide the same functionality. I do not want more purple in the Qirex board by joining the bars top and bottom while it still has some extra in the arrow cluster to break up the rigidness of the lines but I like the added motion the joining grey slash added to the Borderlands board.
So explaining done I might just join in on this and see if people like it. If it became a common style the parts of it would be easier to find and you could make any colour combination.