I wanted to draw this using Photoshop:
However as you can see the dark green rectangle is not a perfect rectangle. It's rounded at the bottom but I don't know how to do this.
I drew a normal rectangle then subtracted an ellipse from it, but I wanted to know if that's the correct way to do things or not... Subtracting forms with Photoshop CS6 isn't precise, or I used it wrong. I looked on the web and didn't find anything.