Sapient 0 Posted February 12, 2011 (edited) Hi, there is a built-in function PixelSearch that uses an internal calculation "number of shades of variation of the red, green, and blue components of the colour", however I didn't see any separate function available to calculate such color differences independently. This is a fairly simple thing to calculate, but since I needed it for my Disable Chrome Incognito script I thought I would include it here in case anyone else finds it useful. My apologies if someone already posted something similar, but I did a quick search and didn't see it. #include <Math.au3> ; Note: Math.au3 needed for _Max() Func _ColorDiff($color1, $color2, $min_return = 0) If $color1 = $color2 Then Return $min_return EndIf Return _ColorDiff(BitShift($color1,8), BitShift($color2,8), _Max($min_return, Abs(BitAnd($color1, 0xFF) - BitAnd($color2, 0xFF)))) EndFunc Note: my version returns the max shade difference across R G and B (not the sum of the three differences). Edited February 12, 2011 by Sapient Share this post Link to post Share on other sites
