Choosing colors for your baby's room should be a much broader concept than it has been in the past. Certainly for parents who are 'progressive thinker' types, anyway.
The standard, 'pink-for'girls' and 'blue-for-boys' is slowly dying, but what to replace that outdated and sexist role model with? Just about ANY colors that are harmonious!
I recently was delighted to come to a young couple's home where they were looking at not only one color for their daughter's room, but two. And both colors were cheerful & bright and not traditionally gender-based. I thought, "Oh good! A girl who will not (necessarily) grow up to feel passive in the world!" Because THAT is exactly what pink can do to affect much of a tradition emotional childhood for a girl child: quiet her, help her to feel unseen/unnoticed/tiny in the world-at-large, and well, just more passive over all.
Of course this isn't always the case, but pretty much, there have been many studies already that tie in the affects of color on both genders, and the results have not been 'pretty': boys demonstrate more aggression when surrounded by intense bright blues- girls more passivity and subservience when surrounded by light softer pinks. I like to combine colors in baby's rooms and children's rooms (between 3 and 12) with hues that are more muted than we usually expect, and break the room up as well with color so that they feel more dynamic and larger than they really are.
In this case of the daughter's new baby room, we selected a soft-but-saturated hue of a dusty purple color for two walls that will surround her crib, and a brighter lemony-green for the walls that invite a person to come into a cheerful-but-cal environ at the same time. Ahhhhh....baby is sleeping.....all is well in this world!
To read an article that I find to be typical sexist drivel when it comes to baby's and children's room colors: http://www.mycastlemagazine.com/home_makeovers/article_44ab2998-9319-11e1-90a5-0019bb2963f4.html