Well, this certainly does not apply to women alone but let me say that maximum racism is carried out by women only! Ok, I might be termed a misogynist for this statement. But, seriously, maximum number of times in my life, only women have pointed out that I am dark and therefore ugly!
So, instead of thinking how to deal with the issue, we should teach them how to face the challenges gracefully. And, this is just a small matter of complexion. I very strongly believe that any hesitation on the part of the parent gets conveyed to the kid somehow even if none of them actually understand what it is and that hesitation does manifest in the kid as he grows older.