I just ordered my kit few day ago. Very much looking forward to get it shortly... so I can not compare.
Not sure whether other members can comment on questions...
But, it is an RGB led. If you scroll through the functions and you see all the 3 primary colors clearly (red, green, blue) according to their coresponding function, I would think the led is fine. Maybe the color mixing is not ok? That is done via the resistors. You may check those again?