Today I stumbled across a very useful site called 'Resources For Scale Modelers'. In particular this page on the site is is very useful if like me you are painting up some WW2 German Armour Link. The fact that he is quoting RAL numbers is useful as well. I notice that Vallejo put the RAL number on some of their paints which is a good cross-check match wise. What I would say is that, notwithstanding that Vallejo are doing that, doesn't always means they are a good match ! LOL