People who cross the line between male and female and are confused for being the opposite sex are referred to as androgynous. They embody sexual ambiguity. They display it in their fashion and/or in their sexual or gender identity.
Scottish actress Tilda Swinton is an ethereal, androgynous star who keeps her platinum blonde hair short and resembles a man at times.
She told the Daily Mail in 2014 she's often mistaken for being male "especially at airport security. I think I should probably wear more lipstick."