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Test whether the two colors are effectively the same.
Colors are considered equal if they have the same ColorSpace, the same number
and values of color Components and the same
Name. This represents value
equality for the colors in question.
The underlying components of a color are represented as floating
point numbers. Floating point numbers are subject to rounding
errors, so there has to be a degree of latitude when comparing
color values. The degree of latitude is, by default, determined by
the color space. CMYK values use a percentage based scale so the
value used to determine the resolution of the comparison is 1%.
Other color spaces use an eight bit scale so the resolution of
comparison is 1/256.
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