/usr/local/php/color.php

#@
#@ color manipulation functions: (the following color parameters are in the hexadecimal form RRGGBB)
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#@ function rgb_compliment(color) - returns the compliment of the passed color.
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#@ rgb_grayscale(color) - returns the grayscale equivelent of the passed color.
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#@ rgb_brighten(color,value) - brighten the passed color by a value.
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#@ rgb_saturate(color,value) - increase saturation of a color by a value.
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#@ rgb_rotate(color,degree) - rotate the color (around the hsv color space wheel) by a given degree.
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#@ rgb_left_neighbor(color) - returns the colors left neighbor.
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#@ rgb_right_neighbor(color) - returns a colors right neighbor.
#@