Huh. Maybe it's not that I was reading so much about the RGB spectrum, but rather color theory. Look, she's blue! And she's CRYING! That's deep stuff, right there.
The deal with the REAL Nanase, meanwhile, is that she turns the color of her normal color scheme minus the missing spectrum. I'm not sure why the magic would work that way other than some sort of flair for the dramatic which magic surely does not have.
I believe the Goo is quoting Star Wars in panel five. Darth Gooder? No, that makes it sound good... Well, I suppose it could be deliberately ironic.
Commentary added Nov 10, 2014