BLUE TONGUE SKINKS

so ive been seeing babies for sale and wonder,do their colors get brighter with age,duller,or stay the same?

Look at the parents. No matter what the baby looks like, it will pretty much look like the parents when it ages. You'll have people attempt to sell you amazingly colored babies, only to have them age dull. Or you can get very dull looking babies that seem to bloom.

genrally there pattern stays relativley the same but there color can change

Generally it does. The neat thing I've seen though is how even the pattern can differ. The pattern can break up a bit, or get speckly (northerns and kei island especially) or fade to being barely noticable (tanimbar).

Most species of indonesian skinks (indo, merauke, kei, tanny and IJ) look very similar at birth, but turn into very unique looking adults.

BTS are so amazing