Red Platy with darkened back after having fry

Jul 12, 2013
32
0
0
California
#1
My red platy just had fry on Thursday and she hasn't been herself anytime after.
She has still been hanging up in the corner, hasn't eaten until Saturday evening, and now has a darker brownish back.

She's starting to be a little more social and is eating now though. I just would like to know what the dark coloring is on her back.

Thank you!