hmm..this is a hard one! It would be hard to tie the blue in with the pink, orange, and yellow flowers, however the blue would look good with each of the colors separately. What if you did the same centerpiece, with same flowers but different colors? Like keep the orange but do white instead of pink/yellow.. I don't think you need to add too much blue into other decorations. My BM dresses are a mint green, but most of my decorations are neutral colors. Good luck!