Personally I think the wonderful painting of Sang Eon is exemplary and an inspiration to all painters but it is slightly too bright a shade, be aware that the colour space of monitors is misleading as it it using the primaries of light, namely red, green and blue. print as in the colour art is a different colour space, cyan magenta, yellow and blacK . Dyestuffs for textiles are totally different, they use either natural plant or vegetable dyes and even chemical equivalents. My point although a convoluted way of explanation is we often use printed and computer screen references which will always differ between not only themselves but from monitor to monitor, print will similarly vary. So the only way would be to see a uniform in the flesh in a museum or at a re-enactment where original 1940's items can still be bought. Or as I do from memory of my dad still having his dress jacket from the 1940's and his forage cap (sadly I don't have these any more, but I do have his RAF wings from said jacket. Vallejo and other manufacturers try their best to match these colours but I would just try your best from whatever reference as shades of any textiles will vary from batch to batch, with wear and dry cleaning or washing. I hope this helps and would welcome comments from other PF members. Good luck, I can't wait to finish this bust myself. Message ends over and out.