[Sunred]

And let's not forget, the term tsuika senshi tends to be used for heroes we primarily dub sixth ranger which literally translates to additional warrior, while those such as Ninjaman, Signalman and Black Knight Hyuga, Magi Mother are categorized as bangai senshi(extra/spin-off warrior) according to those end snippets from Boukenger.
Kyoryuger is quite the exception but if I had to categorize I would say Gold is the tsuika senshi while Cyan, Grey, Violet, and Silver are bangai.