Now, to customize its hexadecimal value, you'll need to do a little programming. In the same options section, change the name of the Hex text box for the new number to any name you like to identify it. Then, open the "Card" tab and click on "Script..." where you'll simply need to paste this:
on view do TheSigmaColor.text:f format patterns[40] end on apply_pal do patterns[40]:f parse TheSigmaColor.text end
Then exit the section by going to "File -> Close Script"