Totally understandable! It's a mess how different pieces of text are hidden different places. I really need to step up on documentation once our program actually kicks off!
The text is in
Control Room -> Programs -> Static Text under the label:
Here's the current CSS as it appears in
background: repeating-linear-gradient( -55deg, #222, #222 10px, #333 10px, #333 20px );
If you want to restyle the way it looks, you should be able to override those CSS classes by defining them in
Control Room -> Programs -> CSS Styles.