I've just learned that most stores sell bow ties in two categories: (1) formal and (2) everyday. Of course all of the more brightly colored fun ties in are in the everyday category. My Dad wore bow ties, and as an homage to him, I wanted to get the groomsmen all different (but coordinating) ties in lighter blue tones (April wedding with black tuxes). But now I'm wondering if those ties are considered too informal for a tux? Any ideas? Thanks!