Peppered Cory question

[SharkaThon]

So after looking at a lot of members' pictures on here, I have noticed that my Peppered cories are starting to get some really dark green towards their dorsal fins. It's really pretty, but I just want to make sure that everything is ok with them. Sorry for the bad pictures, that's the best I can get with a cylindrical tank.

[NorthcoastGirl]

my cories have a greenish shimmer around that area, too. they're all healthy, so it's probably part of the coloration. Are yours acting alright?

[msjinkzd]

They look plump and healthy wiht good barbels.

[SharkaThon]

Yeah they're acting fine (I guess, I've never had cories before but they don't seem to be acting strangely at all). Thanks!