I was really only interested in two of the four "earthy" tones but changed my mind the more I saw them mentioned. The two I'm swatching for you were my top two picks, thankfully. I'm also going to compare one with a popular Paint Pot from MAC.
Mossy Green is a deep olive/mossy green with slight gold shimmer.
Rich Mahogany is a dark rich brown with a reddish/orange shimmer.
I thought I'd compare Rich Mahogany with MAC's Constructivst Paint Pot because I thought they looked very similar in the pot and the Color Tattoo's are often compared to the staying power of the Paint Pot. At first I thought the Maybelline was going to be the more red of the two. After swatching, I was surprised to see how much more red the MAC looked. The MAC one has more of a metallic finish to it where the Maybelline is more of a sheen.
PS - let me know if you like the larger pictures. I go back and forth with picture size because sometimes they just seem too big but I know it's nice to have detail. :)