I've got a RS Magpul Maid grip (labeled Dark Earth) and a Magpul PTS MOE Dark Earth AEG grip in my shop right now.
They look identical...shade/colouring wise.
They are both a bit of a colour difference compared to a FDE G&P MUR body. The body looks a bit more yellow-y/lighter. Not much but it shows.
BTW...it all looks pretty much like something between Khaki/TAN/CB to me.