>>23356068
>Red
Kuuga, Ryuki, Faiz, Kabuto, Den-O, Kiva
>Yellow
Agito
>Blue
Blade
>Purple
Hibiki
>Magenta
Decade

That's not even getting into the fact that both Agito and Hibiki's final forms are red and Faiz's is primarily red over just being red accented. It's a pretty big shift from Showa Riders typically having green or black as a primary color, though even they feature red prominently in their designs.