I like it. One thing I'd probably do with it to brighten it a little bit is couch a yarn in either a mustard yellow or that yellow-green color (or even that teal color) between the 2 borders or between the inner border & the main block.
The other option would be to pick a bright color to quilt the border. But all in all, it's a very nice looking quilt. I usually detest T-shirt quilts, but that one is really attractive.