That's what I found too all the Super MJLEDs are blue-tinted.
I don't think batteries can improve the tint.
Beware there is a slight chance that
Fresh lithium AAs could burn out the (s)MJLED - the advice is to use them a bit before using with (s)MJLEDs.
Personally I think that plain alkaline AAs are fine in the (s)MJLEDs - since the run time is already ridiculously long with the good brightness.
According to reports at CPF even when the alkaline AAs go dim with the (s)MJLEDs - there is apparently still Lots of juice left in them to power the other favorite/inexpensive
Nite-Ize LED Drop-in for MiniMag 2AA for quite a bit longer.