Sorry, but I am pretty sure, 99.9% certain that is not a Khaki top. Khaki (OEM) has a greenish tint to it that would really be pronounced against the Desert Sand color of his Sahara. Desert Sand exists in the red/brown tonal range on the color spectrum and the dark tan that is on there blends well without any contrast. The greenish hue of the Khaki would be more of a contrasting range and would really stand out as being such.
This is a pic from the web and if you look over the rear flare, you can see the hue I'm referring to.
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