Great update but I think now Gnabry doesn't have this hair color. He had it in WBA.
18.03.2016: Arsenal train ahead of Everton match:
http://www.arsenal.com/assets/_files/scaled/1000x723/mar_16/zp_611356861_SM_0539_44B30FE352D8CE165282A81BBCE8D1BC_5804.jpg
24.03.2016: After match Germany U21 and Faroe Islands U21:
http://media.gettyimages.com/photos/leroy-sane-of-germany-hugs-serge-gnabry-after-the-2017-uefa-european-picture-id517289408
18.03.2016: Arsenal train ahead of Everton match:
http://www.arsenal.com/assets/_files/scaled/1000x723/mar_16/zp_611356861_SM_0539_44B30FE352D8CE165282A81BBCE8D1BC_5804.jpg
24.03.2016: After match Germany U21 and Faroe Islands U21:
http://media.gettyimages.com/photos/leroy-sane-of-germany-hugs-serge-gnabry-after-the-2017-uefa-european-picture-id517289408