[Aoi Kurenai]

Yellow being seen as a girl's color in Sentai at the time was definitely the reasoning it wasn't used in Kyoryuger. (this leads to the whole girls aren't as strong as guys thing)

I've always thought the color changing gimmick with ToQger was a bit of an experiment. You get kids used to seeing rangers in colors that are typically used by the other gender little by little until you can go ahead and do a full on series like that. It's not surprise that the very next series gave us a male yellow and the one after gave us a female blue, which hadn't been seen since Magiranger.

Quote:

I know what you're talking about and that was the reason, but it was one given by the writer, not TOEI

Riku Sanjo never commented on that. The quotes come directly from the producer, Takahito Oomori.