Use of 蓝 (Blue) in a Specific Context? 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?
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