Depends. My favorite colors to wear are black and green. I like cargo shorts/pants, and black tops.
I also think nature is the real only true physical beauty, so I tend to like blue and green mostly.
Really its all the colors, or whatever strikes me at the time.
Combinations of sea green, aquamarine, turquoise, and other blues and cool colors that blend together well are the best..
If I had to pick, there is a particular shade of gray/green that I saw someone wearing once. It also slightly shimmered, so perhaps it's not simply the color, but if I saw him with it on again and could figure out how to do it without ruining the shirt, I'd probably slip a knife between his ribs to take it for my own...
Used to like black/dark gray to wear, but otherwise as everyone seems to click with, nature greens--even the "ugly" olive green are my favorites.
I can tell you I don't favor oranges or pinks much, other than those I'd wear any color.