Achromatic colours have no saturation. The achromatic range includes white, grey, and black. Despite the absence of any hue, achromatic colours still create a distinct emotional and visual impression.

Black

Black is a colour with no brightness whatsoever. It tends to be associated with emotional distance and a sense of being closed off.

A preference for black in clothing can be read as a desire to remain emotionally guarded and detached — a tendency to keep one's inner feelings hidden from others.

White

White, unlike black, contains all colours within it — and this gives rise to entirely opposite associations. White is linked to lightness, purity, and openness.

A preference for white in clothing can come across as a sign of openness and ease in communication.

Grey

Grey is essentially a darkened white. When overused, it is no coincidence that grey can evoke feelings of sadness and melancholy — its brightness is suppressed by the presence of black.

A preference for grey in clothing can make a person appear more reserved and unassuming — someone who is not particularly seeking to draw attention to themselves.