Tiger Barb Question

[CysticCrab]

Hello everyone i have a little question. My roomates tiger barb seems to have changed its stripes from black to a very slight greenish blue, still looks and swims healthy other than that any ideas

 

[Jv777j]

My barbs turn really light grey sometimes so I guess it's normal but not 100% sure.

 

[Steve H.]

Could just be what is called the Tyndall Effect. That metallic blue/green on the fish is seen when the light in the tank is reflected in a particular way.

For my Tigers you don't see this during the day, but at night when it is just the light from the tank this coloring shows.