I've never seen or heard of a green Corsair, but that doesn't mean it might not be so. The F4U-4's used for BBBS were left in their original Glossy Sea Blue paint although this is incorrect for 1943 Solomons planes. If the planes' owners didn't want them re-painted authentically, I doubt they would have them painted in something like green. However, I don't know either way. A photo or screencap would be best.
Also, Glossy Sea Blue can appear to be many different shades from purple-ish to green-ish depending on how it's photographed.