I prefer that the consistency of what you've already done be kept, though you've plainly shown that the 'canon' of this world could allow for a change like this. I suppose the better question is, "How would it serve the story?" And, if you prefer drawing him that way, so be it. This is your tale, and I trust you to know how best to tell it.
Sorry I was mourning the changes in Javert automatically. both these characters appeared. I loved the original movie.....The new changes are very well drawn but I haven't been to see the new movie yet.
(I'm still just in general shock over Javert's hair....o.O All men, with hair, should wear it long, it makes them look more sophisticated...At least my g/f tells me so.)