Possible Clues:

• Hair colour
• Marilyn Monroe, notably
• Sort of noble word ultimately preferred by gentlemen?
• How come this always refers to a woman - how can that be fair?
• Word from Middle French for ''light brown''
• ''Platinum'' shade
• Brunette's opposite
• 'Legally ___' (Reese Witherspoon film)
• Like brownies containing butterscotch chips, say
• One who's fair