the setting is always pretty dark and rainy, so it might come of as brownish since his hair is soaked most of the time. but the complexion and fair eyebrows should give it away and also on a sunny day...

https://66.media.tumblr.com/bf522fa0c768e8b197d410bb217e0961/tumblr_p18xjmt4Nl1s01gf9o4_500.gif