In the the books Daario Naharis is much more flamboyant, taking after his Tyroshi roots. The Tyroshi are known for dyeing their hair bright colors and wearing bright clothes. Daario is described in the novel "A Storm of Swords" as having a blue trident beard and bright blue, long hair, with a gold mustache and one gold tooth. While both Ed Skrein and Michiel Huisman have done an outstanding job of playing the character in seasons three and four through six, respectively, they aren't exactly what George R.R. Martin had in mind.