@Puebloswatcop Maybe this will help a bit....
1. Google search:
porsche ravenna green2. From the results, choose an option that references "rennbow.org", like this:
Ravenna Green (Rennbow) | Porsche Club of America ...
https://www.rennbow.org/colorwiki/RavennaGreen3. When you land on the Rennbow page for Ravenna Green, scroll to the bottom where it says this:
Photo Gallery of Ravenna GreenOther examples of Ravenna Green across Porsche model range4. In a new browser window for each color, do the same for these search terms:
porsche acid greenporsche birch green5. For each color, I was able to find a picture from the "Photo Gallery..." portion of each page, where the lighting was fairly similar, such that I could see the very basic tonal differences in the 3 colors.
It's not a definitive method to be sure, but maybe it will help?