Wow, I'm dumbfounded. A vast majority of people responding are claiming that it is not racist, when in fact it is 100% racist. Having preferences is understandable, however, to eliminate an entire race from that preference based solely off skin colour is discriminating and shows racism.
Easy way to put it, let's say you are white and you are not attracted to hispanics what-so-ever, like being hispanic is an absolute game breaker for a relationship. You find your dream girl, she has the personality you love, the smile you love, the charm, the humour, the eyes, everything about her is a perfect match and she's the one you want to spend the rest of your life with, and she's white, win for you, right? Now, we take the same exact girl, same everything about her, everything you love about her, everything you would never give up about her, but now she is hispanic. Is she no longer your dream girl? Did you rule her out because she is hispanic, because her skin colour is the colour you dislike?
So yes, it is entirely racist, you're segregating and discriminating others based solely off their skin colour. In fact, to single out an entire race based on preference is not only racist, but it's completely shallow of anyone who thinks otherwise as they are taking looks into account more so than personality, or who that individual is inside. So please, do not bother even acknowledging those who say it isn't racist on this thread, they are blind, literally, as they're so called 'preferences' are shallow and prefer looks over personality.