Well, no not really. Khaki Od is not appropriate for US armor. Its was a dark OD. That is very close to the color used on jeeps and trucks, which is very different than armor. They used two different colors.
Now sunlight and shading can affect your color on the camera and my PC etc, but that looks wrong on my screen.
look over this article by Steve,
http://www.militarymodelling.com/new...ive-drab/4536/
look at the photos of the line up of the light tanks, and the half track, these appear to be color period photos with fairly fresh paint.
try this out, mix your own following the forumla I stated. I am going to finalize my mixture this weekend if you want to wait. Ochre is a orangey mustard color, hence why I add brown to yellow in the mixture.
I will post back when I have the color mixed correctly.
Keep in mind size compression. On a small tank it will look darker than on a full size real tank. A little less black or a few drops of white will tone it down but still be the correct color.