"What color are your eyes?"

Translation: Hvilken farve er dine øjne?

[Shostarsson]

Why is it not "Hvad" instead of "Hvilken"?

[rasmuscph]

"Hvilken" is the proper word grammatically but in daily speak most people would probably say "Hvad". It would, however, annoy linguists.

[SuzannaWaldorff]

Dine øjne har farve - de er ikke farve. Men man kan sige : af hvilken farve er dine øjne. Mine øjne er blå - de har farven blå.