Yellow Tang not fully yellow

[njreejer]

Added this guy to my tank on the 16th. He’s kinda camera shy & goes into the caves/rock work when I come up close to the tank with my phone but I was able to get a pic

In certain lighting it looks full of color & then in shade it looks like this. I read online it could be due to diet and/or stress
I feed:
TDO Chromaboost
NLS Algaemax
Regular NLS pellets
LRS Seaweed
Tried feeding Mysis but he didn’t go for it. I guess I should be feeding more types of frozen food. Is he like that since he’s still kinda new? I got him on the 16th. I have 2 Clowns, the Yellow Tang & 1 Yellow Eye Kole Tang. The Yellow Tang seems to be eating & swimming around just fine but the color is kinda off putting so I’d like to get your guys’ opinions

 

[4tanks]

I got mine about 5 weeks ago and he is only just getting full colour they discolour at night

 

[EagleEye121]

A lot of fish tend to lose a little color at night. Stress could be a factor too. If he’s eating then I wouldn’t worry too much

 

[njreejer]

It seems to be throughout the entire day for some reason. Not really too worried since everything else is fine but I’ll be sure to keep an eye on him & hopefully he colors up a lil more over a course of time after he’s used to the tank fully

 

[Uncle99]

It’s been 3 days, give him a week or so.
This ones two years old and has a similar patch, sometimes, sometimes not.