hsl2rgb · JavaScript Function to Convert Colors from HSL to RGB

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function hsl2rgb (h, s, l) {

    var r, g, b, m, c, x

    if (!isFinite(h)) h = 0
    if (!isFinite(s)) s = 0
    if (!isFinite(l)) l = 0

    h /= 60
    if (h < 0) h = 6 - (-h % 6)
    h %= 6

    s = Math.max(0, Math.min(1, s / 100))
    l = Math.max(0, Math.min(1, l / 100))

    c = (1 - Math.abs((2 * l) - 1)) * s
    x = c * (1 - Math.abs((h % 2) - 1))

    if (h < 1) {
        r = c
        g = x
        b = 0
    } else if (h < 2) {
        r = x
        g = c
        b = 0
    } else if (h < 3) {
        r = 0
        g = c
        b = x
    } else if (h < 4) {
        r = 0
        g = x
        b = c
    } else if (h < 5) {
        r = x
        g = 0
        b = c
    } else {
        r = c
        g = 0
        b = x
    }

    m = l - c / 2
    r = Math.round((r + m) * 255)
    g = Math.round((g + m) * 255)
    b = Math.round((b + m) * 255)

    return { r: r, g: g, b: b }

}
Last updated 4 years ago.
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