Japonica Shrimp Turning Blueish?

[guppy_man]

I've had 3 of these guys for about a month now, all eating well, but over the past few days ive noticed they have a blueish colouration to them, is this normal or is something wrong, heres a few pics............

biggest/without flash

biggest/with flash

other 2

 

[Esfa]

I've heard it's normal.

One of mine went blue for a few days, too.

 

[guppy_man]

Thats ok then cheers.

 

[Shrimper]

Its normal, My Anamo are blueish sometimes.

It only seems to be the male though, the females turn a bit pink sometimes to complete the stereotype! ! I've only got 4 left so it just could be a coincidence .