Changing the announcement bar’s colour:

1. Turn on the announcement bar by going to Marketing > Announcement Bar > Enable Announcment Bar

2. Site styles and to your color themes

3. Click edit on any of the color themes

4. Click on your announcement bar (the click won't work unless you've clicked into edit one of the themes, doesn't matter which one)

5. By clicking the announcement bar, it will bring up the colour option for it and let you change it.