Sometimes, we fashion artist especially myself use color value to depicts moment or occasions to conform with a fashion outfit.
You can change the value of any color by adding white. A light value is called a tint. A dark value of a hue is called a shade. Outfits dominated by tints are called high key designs. They are usually seen as cheerful, bright and sunny. Low key outfits are dominated by dark values. They are often seen as dark, mysterious or gloomy which is best to describe just ended 2020 the year of covid-19 hence the above outfit.