I am using Moodle 3.4.2 and the "School" theme. I have been able to make all the changes I wanted to make for this with a few exceptions. I am unable to figure out how to change the color of the text in the "Turn Editing On" button. See the white button in the image below. I have the same problem with the "Log In" button on the login screen.
Also, how can I remove the "General" section at the top of the course? It doesn't seem to want to go away.