I've gone by the dealer to see Cactus Gray four times (Rangers and Bronco Sports). It looks different in the sun vs a cloudy day, but I liked it. Should look good with darker MIC top, until I get a white top.
Take a look here and here. It's a cloudy day in the first one, but the color is accurate. In the second, it is under artificial lighting, but I would say it is also accurate. It all depends on lighting conditions and the environment. Your perception of color is also a factor. Many never see the green tint, but I have found most do. I almost always see the green, but it does disappear given the right angle and lighting.
The best thing you can do is go see it at a dealer multiple times in different lighting conditions. I originally ordered Oxford White, but made the switch to Cactus Gray after seeing it on the two-door Bronco in person. The color looks great on the full size Bronco.