In the book, Daario Naharis is described as such:
Daario keeps his beard cut in three prongs, all dyed blue. His eyes are blue and his curly hair is dyed blue. His mustachios are painted gold and he has a large, curving nose. He is lithe, smooth skinned, has a golden tooth and dresses in loud colors and finery. He wears a Dothraki arakh on his left hip and a Myrish stiletto on his right hip. Their hilts are a matched pair of naked women made in gold.
In the TV series, his appearance is much more normal. Why is that? I don't think it's a question of budget as GoT is a really successful series.