Oh, lemme list my favorite combinations as of when I am typing this.
safest bet, and most likely to not bother many: Black matte.
Another safe one: Matte dark grey or "off-black", whatever that means.
best "Pyra themed" options: dark red with black details or black with dark red details/trim. Red could be slightly metallic or shimmery, black needs to be flat.
Most like ST:TNG equipment: Light or medium grey with black lines/trim and maybe some other interesting details. I think the logo would prevent it from having the right overall look.
Fun colors that I would need to see before I would need to see before I could say I would buy it: Light grey or beige with some surface texture. Grey and purple (think Sun Microsystems...or maybe US SNES).
Honorable mention clear/translucent stuff that may not work due to logo LEDs: Plain old clear, translucent black, Nintendo's Extreme Green. Red might also look good here (actually, many colors would, including dark purple, orange, many shades of blue, etc.).
Edit: Worst option: any sort of "camo". Even a lot of military equipment is just solid subdued colors, or black.