At a quick glance, it looks like you've got 'bronze green' on the left, 'interior green' on the right...the latter would be a closer match for Curtiss's own interior green mix.
However, since you didn't say which P-40 mark you're doing or the time period involved--or whether you're talking bulkhead colors, or individual components--there is a broader range of possibilities.
Best do a web search by individual model type, and start 'straining' some more specific information.
If you haven't already encountered it, IPMS Stockholm is a great place to start: HERE