@coll51 You can change any color on any overlay in the settings. Click on the and select Settings.
Scroll to the bottom of settings and find Modify Layer Colors. . You will get a window like below:
You can then use the pull down menu and choose any overlay. By clicking on the color chart, you can add, delete, and/or change any color to something more pleasing to you. WARNING!!! . You may loose several hours of your life changing items to your liking. LOL! I know I have.