Yosef Karo, Shulchan Aruch — Yoreh Deah 381
“ A bride who happens to come into mourning during the 30 days from the time of the chuppah is permitted to adorn herself even during the 7 days. A post-pubescent woman who happens to come into mourning, because she is waiting to get married [i.e. she is at the matchmaking stage of life] is permitted to apply eye makeup and rouge but is prohibited in washing in hot water all of her body. A young girl who is mourning is forbidden even in applying eye makeup and rouge. ”
