Edit File: wcag.js
import converter from './converter.js'; /* WCAG luminance References: https://en.wikipedia.org/wiki/Relative_luminance https://github.com/w3c/wcag/issues/236#issuecomment-379526596 */ export function luminance(color) { let c = converter('lrgb')(color); return 0.2126 * c.r + 0.7152 * c.g + 0.0722 * c.b; } /* WCAG contrast */ export function contrast(a, b) { let L1 = luminance(a); let L2 = luminance(b); return (Math.max(L1, L2) + 0.05) / (Math.min(L1, L2) + 0.05); }
Back