drock,my guy can do a tri color for you and have 1 base color and have 2 differnt off colors at the top of the string and the bottom of the string.
So,if you look at it from center serving up,it is 2 colors and if you look at it from center serving down,it is 1 color the same and the other color is different from the top.
See if they can do that for you.That is about as unique as it comes.
Black and silver would look nice.
Heck,nowadays,all black is unique.