I think nothing beats the look of a two-tone color scheme, but I’m also interested in a black case and I think the dark grey keys would be more fitting. Is the dark grey set a mix of two dark(er) greys similar to how the Regular Printed Key Set is a mix of two colors, or is it one solid color?
Also just double checking – there aren’t any printed black key sets? I’m guessing the factory doesn’t have white dye sub capability?
Thanks!
Martin, I created a two-tone Gray colorway by combining the dark gray keys from Model F Labs with a set of lighter gray keys from Unicomp. Unicomp printing isn’t quite as good as the Model F Labs, but the keysets combine pretty well.

Great Martin, glad you are joining the project! The only two color key set is the pearl/pebble (regular colors) set. The others are all one color. The dark gray and Industrial SSK blue make a great match, though you’d need to order two key sets to get any combination of colors. The key tops wear down after a few years of usage so I definitely recommend ordering more than one key set.
For some reason you cannot sublimate a lighter color onto a darker color for PBT; I am not sure the technical reason.

Excellent, thank you for the detailed response! I had no idea that technical limitation existed with dye subbing light colors onto darker PBT; I guess that explains why dye subbing has fallen out of fashion with modern black keyboards.
Typing this on an XT Model F so I’m very excited to join the 90’s layout-wise 🙂