export function calculateLuminance(r, g, b) {
    const a = [r, g, b].map(v => {
        v /= 255;
        return v <= 0.03928 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);
    });
    return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722;
}
export function calculateContrast(rgb1, rgb2) {
    let contrast = (calculateLuminance(rgb1[0], rgb1[1], rgb1[2]) + 0.05) /
        (calculateLuminance(rgb2[0], rgb2[1], rgb2[2]) + 0.05);
    if (contrast < 1) {
        contrast = 1 / contrast;
    }
    return contrast;
}
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