Coloring of Tomini and Kole Tangs

[marisp127]

Curiosity question here. Do the tomini and kole tangs darken in color with age or is it just random special variation? I’ve seen tominis with a pale grayish colored body and then ones almost black. A similar thing seems happens with the koles with that light orange color in the body to a deep rusty color. Thanks!

 

[marisp127]

Pictures for reference:
Tominis

Kole

Note: these are random images I found in a google search, not my own pictures.

 

[9975]

My tomini was about 1 1/4" when I Got him in this pic. He was stressed and darkened like your 2nd pic when he calmed and started eating.

 

[Dabcrusher]

Both of Mines changes I swear it's there mood the tomini will be super light then I'll feed and it gets dark again