So I bit the bullet and tried some green dye.
The feel of the yarn is a little funny now (wasn't great to begin with). It's better, for sure, but I don't have anything to wear it with, and a heavy, knitted top doesn't seem right in the summer, even if it is part rayon and a tank top. And I don't care for it over a shirt (did that 25 years ago, don't need to do it again). So, it's still sitting in my closet, LOL. I did get some info on how to re-work the pattern with lighter yarn though!