HTML/CSS NUMERICAL RGB COLOR CODES

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                  COLOR COMPONENT    DECIMAL    HEXADECIMAL
                 -----------------   --------   -----------
                 R = Red value       0 to 255    00 to FF
                 G = Green value     0 to 255    00 to FF
                 B = Blue value      0 to 255    00 to FF


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            Given the decimal (R,G,B) values, the corresponding
            composite color code (C) can be computed by:

            C = 65536*R + 256*G + B

            The composite color values range from 0 to 16277215.

            The composite color code acts like a sequential serial
            number for each of the exactly 16,777,216 shades of
            the RGB spectrum, from 0=Black to 16777215=White
            and all 16,777,213 possible shades in between.


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            Given the composite color code (C), the corresponding
            decimal (R,G,B) values can be extracted by using the
            following algorithm:

            R = floor(C / 65536)
            B = C mod 256
            G = floor((C - 65536*R - B) / 256)


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            NEGATIVE or INVERSE RGB and COMPOSITE COLOR CODES

            To obtain the negative or inverse of an RGB color code
            simply subtract each of its RGB components from 255.

            Inverse RGB = rgb(255−R, 255−G, 255−B)



            For the negative or inverse of a composite value,
            simply subtract the composite value from 16777215.

            InvCompositeValue = (16777215 − CompositeValue)

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