Thank you, you are correct. It was the only option I could think of. I like your theme but the aqua color is an issue.
I made a copy of the style.css and edited the copy.
I found the documentation on creating a “child theme”. I’ll study that.
I believe I found 72 instances of the aqua color #1bbc9b. I’m not sure I would know how to use the additional CSS to make that many changes.
It would be great if I could find a function to universally substitute one color number for another, but I haven’t found anything like that.