Green is always a wonderful color to sell because it's considered an "Earth Tone" and earth tones are popular, timeless colors.  

When you're listing merchandise online it is exceptionally helpful for your buyer to be told exactly what Shade of Green it is, because a "Green Polo Shirt" can be a variety of shades and due to the buyers screen settings, a shirt can look like one shade on their screen yet is a totally different shade IRL. 

Here's a super simple list of the most common green shades.  You can click on the image below to enlarge it: