Summary of exo's new hair:

Suho - Darker (not sure)(or didnt change)
Do - Caramel colored
Kai - curled in front
Chanyeol - unknown (wearing a hood)
Baekhyun - curled and shade lighter caramel
sehun - wearing a cap
Tao - red and black
Chen - has a cap on
Lay - shorter
Xiumin - shorter
Luhan - Silver/ Lavander
Kris - shaved side and black (everybody knows his hair, LOL)

information came from: @chocolyn_