Anyways about her co-workers wondering about her new due/look. She could simply say that she dyed her hair to the original color ("red") she was born with so that when she goes public about her company ideals, she would look genuine rather than coming out as "fake" with her "dyed" blond hair. That way she would better to appeal to the crowd with her "true" genuine look. Making her easier to trust with.
Her previous look: