Traditionally in many parts of the world, darker colours have been considered masculine while lighter colours have been considered feminine.
But when you read about Yin and Yang or other traditional or spiritual descriptions of duality or the Divine Masculine and the Divine Feminie, it’s actually the masculine energy that is described as light and bright while femine energy is described as dark and mysterious. In different ancient cultures the sun is masculine while the moon is femine. Yin is the shady side of a hill while Yang is the sunny side.
Things are changing now as more people wear whatever colour they like (it’s not unusual to see big, tough NHL players in lilac or bright pink suits anymore), but I think that men were drawn to darker colours not because they are more manly or macho but because they are femine and vice versa with ladies. People were drawn to those colours that were representations of the other half of the duality —their complements.
Maybe it’s a good sign that there is more “colour freedom” now. Maybe it means that more of us are no longer holding to the extremes of these principles and denying the complementary energy. Maybe we humans are moving closer to true duality.