Adriatico (and anyone else who is curious),
I've uploaded my colours spreadsheet, for you to play around with. I'm not sure how helpful it will be but if you want I can explain the basics of it.
It's an Open Office spreadsheet (
www.openoffice.org).
Download the spreadsheet
here.
By the way, ignore the Arctic and Med sheets, they're very old. The Atlantic sheet is the one I use.