Hi Joe
What are you currently using for a reference when you say the RLM76 looks spot on??
As you know the RLM 74 75 and 76 are very common luftwaffe paint schemes and every paint manufacturer probably sells one. However one mans 74 looks like anothers 75 or whatever. Wait till you try RLM 81 82 83. Where's that Advil??
You don't know what that paint manufactures reference was/is when they choose a color. You also cannot go by color chips off the internet because of the varied differences in monitors,software, sources etc.
I build mostly 1/32 WWII planes and finally ended up purchasing several books/references that give actual paint color chips. However even these can vary. Sometimes you can take an existing color and change it. Many modelers prefer to "MIx there Own" color schemes,also taking into account lightening for scale...if they practise that???
One source I recommend is Eagle Editions. They use to sell a fold out chart with the luftwaffe colors most commonly used. I think they give a link to someone on Ebay that still has some for sale. Many modelers won't even agree with certain colors within a given color chart. Now what do you do??
The question of " lightening for scale" is also hotly debated. For instance, I know two different plane modelers here where I live... one does lighten and one doesn't lighten and honestly I cannot pick between the two.
I have tried both ways and I am inclined not to lighten for scale..but I could change my mind at anytime.
I hope this helps some
Steve J