I tried mint green and it didn't work. Mary Kaye's can be difficult because the white of the finish, the amount of wood showing through, and the color of the wood showing through all effect the final body look. Then there is the problem of not all mint greens being the same. I went with a three ply white, black, white because it made the parchment knobs and the body coexist nicely. Also if you have a dark or light colored neck it can influence if a light pick guard or a dark one looks good. But the final, and in my opinion necessary, step for my Mary Kaye Strat was the bakelite pickup covers. Really tied it all together.
Patrick