Color:__newindex(Color, string) shared Metamethod for when the newindex field doesn't exist. Sets values when indexing r, g, b, a or 1, 2, 3, 4. Arguments color Color field string Examples Color:__newindex – Metamethod for when the newindex field doesn't exist. Sets values when indexing r, g, b, a or 1, 2, 3, 4.