A basic rule of thumb when it comes to the color of modern US armor, is that if the interior of the vehicle won't be seen from the outside, it is normally gloss white.
If the vehicle operates with a large hatch open, like an armored personnel carrier, for troops to egress, then it is sea foam green, more of a satin finish.
So tanks tend to be white and APC, IFV, CFV are sea foam green.