I think is going to be green, you know, red, blue and green, those are classic colors for japanese stuff.
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.
I was mainly going off the fact the Sparrowmon is Nene's primary partner, and yellow would match that color/primary partner scheme.
See. It just makes sense. A Sixth person can be whatever color they want it to be. Possibly white or orange or purple.
Yeah, I guess it makes sence that Akari damaged cell could turn into a pink one...
Now we agree. That would work. The Frontier kids did that.