postcss-color-functional-notation is a PostCSS plugin that transforms CSS color notations into modern functional forms like lab() or lch(). It intelligently converts hexadecimal, rgb(), and hsl() colors, enhancing code readability and future-proofing your stylesheets. This plugin helps manage color variations and accessibility by employing CIE color spaces, promoting consistent color definitions across your project. It simplifies maintenance and allows better control over color properties.