The Cure: Printastic!
Start with a basic pair of dark denim, or lighter if you wish depending on your mood and find a great printed blouse that incorporates the color combinations of the season. The print keeps you from messing up your mash up of color. Go with a basic shoe and 3/4 sleeve lightweight blazer, then choose one color from the print that you want to stand out and coordinate your accent piece with that color.
Side effects: Choose just ONE accent color and ONE accent piece, even if you keep with the colors of the print, choosing more than one could make your look unbalanced.