I think your idea has much merit, especially since color questions arise regularly on this forum.
One of the problems with publishing this information for reproduction on a computer display (or printing it) is that the color component data can yield quite different results on two different displays or printers. Bringing two different systems into color space synchronization is a topic that is far outside the scope of a quick message -- but it's not an impossibility.
I'd like to assist you and Jan in this project, especially since I have my own requests that I hope you can answer
. I have a color-calibrated system, am using PhotoShop CS2 and I have done the conversion between Methuen codes and RGB-CMYK color spaces (I think successfully, because at least my results independently matched what Mark Miller came up with for five-color lozenge). Tonight I'll send you an email with tables that I've built for 4- and 5- color lozenge. In any event, I'd like your opinion on this work & I've been meaning to get in contact with you regarding it.
Finally, here's a few requests that I'd like to see published --
1. What are the colors for the green-mauve camo seen on some of the very early Pfalz D.IIIs?
2. There is a very famous Pfalz D.III from J.10 that was shot down and captured relatively intact by the British. Several well-published photos of it exist. I don't recall the pilot's name, but I believe that it was assigned serial number G.111 by the British. The plane had a green tail, the rudder of which survives in the collection of the RAF Museum. Do you know what shade of green the tail was painted? The color range given in the J.10 Data File Special (Methuen codes) do not seem to match the tone of the tail color in the b&w photos.