Try this.
http://joshuaink.com/blog/400/free-os-x-apps#c005815
The OS ColorPicker has a few nifty tricks up its sleeves. Plus it supports third party pickers. I suggest using it where ever you can.
Sweet, check this out...
http://www.apple.com/applescript/gui...gs/sbrt.04.htm
set theColor to (choose color)
set the clipboard to my RGB2HTML(theColor)
on RGB2HTML(RGB_values)
-- NOTE: this sub-routine expects the RBG values to be from 0 to 65536
set the hex_list to ¬
{"0", "1", "2", "3", "4", "5", "6", "7", "8", ¬
"9", "A", "B", "C", "D", "E", "F"}
set the the hex_value to ""
repeat with i from 1 to the count of the RGB_values
set this_value to (item i of the RGB_values) div 256
if this_value is 256 then set this_value to 255
set x to item ((this_value div 16) + 1) of the hex_list
set y to item (((this_value / 16 mod 1) * 16) + 1) of the hex_list
set the hex_value to (the hex_value & x & y) as string
end repeat
return ("#" & the hex_value) as string
end RGB2HTML