@peculiar/color/dist/esm/get_contrast_ratio.js

Library for color manipulation and conversion in JavaScript.

import { getLuminance } from './get_luminance';
/**
 * Calculates the contrast ratio between two colors.
 *
 * Formula: https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-tests
 */
export function getContrastRatio(foreground, background) {
    var lumA = getLuminance(foreground);
    var lumB = getLuminance(background);
    return (Math.max(lumA, lumB) + 0.05) / (Math.min(lumA, lumB) + 0.05);
}
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