The CSS Working Group has published a First Public Working Draft of CSS Color Adjust Module Level 1. This module introduces a model and controls over automatic color adjustment by the user agent to handle user preferences, such as “Dark Mode”, contrast adjustment, or specific desired color schemes.

CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, etc.

Original source: https://www.w3.org/blog/news/archives/7750