Why does Fox News make their white female anchors dye their hair blond?

I have yet to see a white female anchor on that channel with brown, black or red hair. Why?
Update: There is no hidden meaning or agenda behind this question. It seriously puzzles me that all those women have the exact same pale hair color.
Update 2: There is no hidden meaning or agenda behind this question. It seriously puzzles me that all those women have the exact same pale hair color.
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