color-alpha

color-alpha

Change alpha of a color.

$ npm install color-alpha

import α from 'color-alpha'
α('white', .4); // 'rgba(255,255,255, 0.4)'
α('oklch(0.628 0.258 29.234)', .3); // 'oklch(0.628 0.258 29.234 / 0.3)'
α('rgba(244, 244, 244, .3)'); // 'rgba(244,244,244, 0.3)' — no alpha reads the color's own

Input color is parsed with color-parse: legacy rgb/hsl keep comma syntax, modern spaces (lab, oklch, color(display-p3 …) etc.) serialize with css slash syntax. Unparseable input returns undefined.