As we have seen Daario Naharis in season 3 will not show his trademark tyroshi blue beard that means that the character Greenbeard from the Brotherhood Without Banners will not show his beard or maybe the creators will re imagine his character the same way they did with Vargo Hoat that is now known as Locke.

​The main reason to why the tyroshi characters will not sport their flamboyant dyed hair may be because of the inaccuracy of dyed hair in medival time also of the difficulty to make both beard and hair in equal measures.

​The only reassurance is that at least they chose a good actor to play the role of the flamboyant tyroshi sellsword we've all been waiting to see in the series