First up: good to see you’re actually trying to get the colours
right instead of going with somebody’s interpretation of 1970s incorrect notions of what they were
If you buy yourself a copy of Mike Starmer’s
The Caunter Scheme, it has paint chips in the back of the book, of model paints that he has matched to the real colours as closely as he could. You can e-mail him at
mikestarmer18@gmail.com (that address is also on
this site about his books, so I don’t think there’s much of a problem with posting it here).
Alternatively, buy yourself this set of model paints from LifeColor:
Lifecolor Caunter.jpg
Or only the individual colours you need, of course. Just search for "LifeColor paints” and you should find model shops that sell them. The UA-numbers under the samples in the image above are LifeColor’s paint numbers. If you paint some swatches with them, your paint shop should have a good sample. Beware, though, that LifeColor paints are really poor for brush-painting, and need a lot of coats to cover even moderately well if you do. They cover well enough when sprayed, but because they come in 22 ml bottles I don’t think you want to be spraying them through full-size paint guns

They thin and clean up with water, BTW. Trying to use anything else often results in thick goo that’s hard to clean out.