Pair of Argia sedula in tandem

I have seen a little bit of temperature-dependent color change and heard of it while in copula and I'm not sure if this qualifies or if this is just odd.

It was just one eye and part of the face that was colored.

@greglasley @jimjohnson @scottking @nbdragonflyguy @nlblock have you guys seen this before or do you have any hypotheses?