Good quality, nice colour splash. I got the XDA red set.
They appear to be the same "beige/black XDA blank" caps that came with my Massdrop Preonic. However, that build called the light colour caps "beige". This set calls them "white". They're the same colour, it's off-white, beige is probably the best description. I was hoping for more options, but now just have a lot of beige. At least the two sets go together nicely.
Apart from that, these are great, they do exactly what they should. The below photo uses a combination of these keys, and the blacks that originally came with the board.