SO I got tired of the lineart sitting around on cardboard, so I went over it in OC and then decided to color it.
White dragons are also called Wolf- or Wooly dragons because...well...they're fuzzy! The fur grows out from between the scales which gives the coat a sort of faint 'quilted' look, which I just made up so it's not in this picture.
Being of an Elemental nature, the fur doesn't really do much except make them a little quieter in flight; even the top of the wings are fuzzy. The undersides are white hide fading to pink and covered in dense peach fuzz. Of course...nothing about them is really necessary...they're fucking DRAGONS.
They're smarter than most other versions of Whites you see, too, but while they're not retarded or less intelligent than the other species, they do lack certain inhibitions when it comes to their basal, predatory nature.