That's what I did, I matched my grilles and gill mesh to my wheels. Gunmetal or dark gray would look great on a carbon blue tib, imo. Let me know if you need some pointers on wrapping the mesh on your grilles, it can be kind of a pain. Once I hit 100 posts, I may start selling them pre-wrapped.Im going to do this soon too! I want to color match the mesh to my future rims and perhaps also do the gills. My tib is Carbon Blue, thinking of gumetal for the grille, rims, etc. Still undecided. Contemplating white too, but I think it might be too bright in contrast with the dark blue.