I tried changing the background color of the header too, just to see and that change also did not implement.
Which led me to this thread: How to get CSS changes applied to Sage theme - #3 by bigdaddyswag
So with your response along with the response on the other thread it’s just a matter of running yarn build.
I just that I have to figure out how to do that on a live site. I tried to access the site via an SSH key last night but it did not work. I think that is the right direction though…
I will update this thread once I get it. 