When a color combo troubles me, as in our current Play Date Cafe Challenge (Baby Blue, Orangesicle, and Basil), I use lots of white and small doses of the colors.
Card recipe:
Stamps: Dare to Be - Verve
Paper: white - PTI; Bashful Blue, Pumpkin Pie, Certainly Celery; patterned scraps - SU
Ink: Versafine Onyx Black - Tsukineko
Other: Pumpkin Pie Corduroy Button Brad - SU