Apple Script / Start the color choose, convert the selected color to HEX and copy to the clipboard

chose_color.scpt

# Open the color picker
on convertRGBColorToHexValue(theRGBValues)
	set theHexList to {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"}
	set theHexValue to ""
	repeat with a from 1 to count of theRGBValues
		set theCurrentRGBValue to (item a of theRGBValues) div 256
		if theCurrentRGBValue is 256 then set theCurrentRGBValue to 255
		set theFirstItem to item ((theCurrentRGBValue div 16) + 1) of theHexList
		set theSecondItem to item (((theCurrentRGBValue / 16 mod 1) * 16) + 1) of theHexList
		set theHexValue to (theHexValue & theFirstItem & theSecondItem) as string
	end repeat
	return ("#" & theHexValue) as string
end convertRGBColorToHexValue

# {65535, 0, 0} == red
set theRGBValues to (choose color default color {65535, 0, 0})
set hexValue to (convertRGBColorToHexValue(theRGBValues))

set the clipboard to hexValue as text