I am in the UK. One example is in germany, the other is in the US and the doctors are not letting me travel at the moment.
I did spray up several different light and dark greys and using various photos which do show different hues dependig on the camera and firmware plus any extra work in photoshop etc gave me a pretty good idea of what is closest.
Also you have to keep in mind that the entire colour system used by Germany was given a radical overhaul after the war and anything used was either deleted or changed, so getting a match, unless an actual reading could be done and then made which would be really expensive and overkill.
This is what is called fooling the subconcious brain. You have a subject which is well known. You then paint it with a colour that is very close and then let the brain do it's job.
The concious brain will say to the sub-concious. That's the pale version of Hitlers big car.
Ok. Yes. Let me dig into the memory. the colour should be this... Ok. Yes. that's it.
The sub concious brain matched the close colour to the original and that's what you see!
In this I see what looks like almost a pearly grey, but lighter and the closest colour I know of is the Fleet Air Arm Sky Grey.
It is the same with the dark grey. It shows some blue in it and some photos show it to be a dark blue but that is probably the camer firmware getting a bit mixed up as most show it to be a very dark grey-blue. One of the RAL colours that remains unchanged is RAL 7024. It looks just about right compared to the photos. They will do for me!