I never thought of red to be more SFB-like as much as brown or standard grey or something. The blue, however, seems like a more-exotic feel with the other colors, giving new life to Tholian ships rather than being standardized hull and something unique that the Tholians truely needed (outside of the ships you see in Klingon Academy, which sort-of helped out with the idea of Tholians using a unique, strong crystal hull that is stronger than even Gorn hull), in which you'd rarely see in most interpretations of Tholian ships (my guess is).