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2.5.4.64 LumDiff

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The LumDiff function calculates the difference in luminance, as specified in the HSL color space, between two color values.

ABNF:

 LumDiff = val val " LUMDIFF():128"

Required Arguments:

Name: Arg1

Type: vColor

An argument that specifies the first color.

Name: Arg2

Type: vColor

An argument that specifies the second color.

Return Value:

Type: PtgNum

This function returns a PtgNum containing a value that is equal to the luminance of Arg1 minus the luminance of Arg2. This value is greater than or equal to -240 and less than or equal to 240.