public static int convertCmykToRgb(final int c, final int m, final int y, final int k) {
        final double C = c / 255.0;
        final double M = m / 255.0;
        final double Y = y / 255.0;
        final double K = k / 255.0;

        return convertCmyToRgb(convertCmykToCmy(C, M, Y, K));
    }
DIN99o.

@param l lightness of color.
@param a position between red and green.
@param b position between yellow and blue.
@return CIBELab colors converted to DIN99oLab color space.
@see <a href=
     "https://de.wikipedia.org/w/index.php?title=Diskussion:DIN99-Farbraum">https://de.wikipedia.org/w/index.php?title=Diskussion:DIN99-Farbraum</a>
src/main/java/org/apache/commons/imaging/color/ColorConversions.java