There is a song sung by William So whose title is 《有人喜欢蓝》 (Yǒurén xǐhuan lán - There are people who like blue.)
What does 蓝 (blue) mean in this context? Is it a reference to the sky, sea, a mood, or something else?
Below is the lyrics of 《有人喜欢蓝》. The singer refers to "blue", for example, as "the serenity at night", "the pleasure he finds in jealousy", and "the mystical excitement". I would assume that he is talking about love: no matter how difficult it is to love someone (jealousy, fear of rejection, insomnia), he falls for "you" for "some inexplicable reason" (see line 5).
有人喜欢蓝 means, poetically, “有人”（i.e. the singer）坚持自己对爱的选择。
I think blue in this case means the color blue, since 藍 in Chinese doesn't mean anything else.
ps: The English name of the movie 有人喜歡藍 is not "There are people who like blue." It is "Blue Valentine". http://www.youtube.com/watch?v=Q7B9LvwT8SU