At the base of it all is the likelyhood that there really is no set color for CDL, I would imagine it's as elusive as PC10 and we all know in our hearts that that's a useless debate. When you consider all the variables involved in wartime supply of the components of the coverings and finishes it becomes way more than just mind boggling. Then one has to rely on "expert" opinions and analysis regarding what the different hues and shades of black and white photos taken 90 years ago really are color wise. It's a crap shoot at best and up to each modeler to decide what is best for him or her and get on with it. Mick Reeves, many time national/European/world champion no doubt has skeptics argue that despite his successes his colors are wrong, so there you are, roll them dice.
Doc