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asked in java script by (3.1k points)
HI All

    Please provide the best way to convert the RGB value to CMYK value in java script.

Thanks in advance

1 Answer

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answered by (8.2k points)
function RGBtoCMYK(r,g,b){
        var result = new CMYK(0, 0, 0, 0);
        r = r / 255;
        g = g / 255;
        b = b / 255;
        result.k = Math.min( 1 - r, 1 - g, 1 - b );
        result.c = ( 1 - r - result.k ) / ( 1 - result.k );
        result.m = ( 1 - g - result.k ) / ( 1 - result.k );
        result.y = ( 1 - b - result.k ) / ( 1 - result.k );
        result.c = Math.round( result.c * 100 );
        result.m = Math.round( result.m * 100 );
        result.y = Math.round( result.y * 100 );
        result.k = Math.round( result.k * 100 );
        return result;
    }

    function CMYK(c, m, y, k) {
        if (c <= 0) { c = 0; }
        if (m <= 0) { m = 0; }
        if (y <= 0) { y = 0; }
        if (k <= 0) { k = 0; }
        if (c > 100) { c = 100; }
        if (m > 100) { m = 100; }
        if (y > 100) { y = 100; }
        if (k > 100) { k = 100; }
        this.c = c;
        this.m = m;
        this.y = y;
        this.k = k;
    }

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