Thanks! I had fun with these designs.
I'm not sure what LD means. By "LD so dark" do you mean Level Design?
If so, we used the color palette limitation of the ZX Spectrum computer (was really more popular in Europe) as inspiration as well as having a sort of 80's/Tron vibe.
https://worldofspectrum.org/
We didn't get the chance to polish it up much though.