Nice work. I have a flowery one I'm working on for my daughter between other projects. I know how much time even a belt can take. As far as making the green lighter, if using water based stains, put some green into a container and add a little bit of acrylic white. Mix and test until you get the color you want. Some tole paints soak into the leather well and can be used to mix custom colors. Dont be afraid to step outside of the "rules" and experiment.