I feel as if you've severely limited yourself in your color choices. Five colors out of all of the ones that are available don't do you justice my good sir.
After all, everything goes with black.

If you still want to have dark colored armor you can try going for a dark brown or a dark blue color.
Also if you are worried about being too dark, you try mixing and matching- light colored metal bits, dark tunic, or light tunic, dark colored metal bits, etc.
I think the biggest reason you may be feeling something is off is because your hair is white and it really stands out against the dark armor and chocobo. ^^