I think it's Yellow. Like all classic Tokusatsu programs. Red/Blue/Yellow.
Haven't you ever seen a Power Rangers season? There is always a Red, a blue, and a yellow. As such, Nene would have to be Yellow. She is the girl as well. (action girl)
For argument's sake, Zenjirou would be Green (which is switchable with black) and Akari would be Pink. (She's the girly girl)
And, http://en.wikipedia.org/wiki/RYB_color_model
There's "smart" proof.
Haven't you ever seen a Power Rangers season? There is always a Red, a blue, and a yellow. As such, Nene would have to be Yellow. She is the girl as well. (action girl)
For argument's sake, Zenjirou would be Green (which is switchable with black) and Akari would be Pink. (She's the girly girl)
And, http://en.wikipedia.org/wiki/RYB_color_model
There's "smart" proof.