Well, I didn't want to screw it up after having applied a bunch of color coats, so I just continued to colorsand and apply more color coats. With additional coats it started to get darker. It is now not quite as dark as the green in the pic I linked above of Jack's old car, but I think it is dark enough to make a nice match with the Solar Yellow.
Here is a pic of the work in progress in my living room:
The color is quite a bit darker than it appears in the pic.