Red, white, and blue are a patriotic combination that can come off as too casual or juvenile for the work day. One way that I ensure this doesn't happen is by adding another neutral into the mix. For this ensemble, I grounded the colors of July 4 with black through a statement necklace, wide belt, and classic pumps.
Recreate the look:
Narcisco Rodriguez for DesigNation pants (similar here and here), Target blouse (similar here and here), Worthington blazer, statement necklace (similar), Nine West pumps, Stella & Dot wrap bracelet and Lakra bangle, similar belt