I looked at the group's technical specs page and found this on color- http://www.wdbsa.nl/colour.htm - which I thought, while helpful, is a bit unwieldy. These days with a HEX code or RGB value you can go to any professional paint shop and have an exact match mixed. I did a little digging into the BS381C colors and found the following four:
My question for the group is how close these might be to the original War Office specs. and if so what dates, makes, theaters, etc. they might apply. Other colors? Or if there is already resource online with this information which I couldn't find?