Yellow, because Yellow and Purple (plum) are on opposite ends of the colour wheel and therefore contrast, making them go well together.
forest green & or black
el bicho
Purpley red
Any color shirt really, anything matches gray.
Brown
... Plum?
Black and white!
Sage Green
brown khaki tan plum (maybe)
brown khaki tan plum (maybe)
Red and blue
pink
poo is fun to play with
It matches the rest of me.
turquise