Hello, I checked your project quickly, I saw that you have added the same class twice to both the div and the button, delete a class and we leave the button class only.
Then we remove the button color in the side panel, and we only apply background color within the button class.
For some strange reason it causes a conflict when using the color in the sidebar that disables the class colors. I think it’s something that @Norm would have to review.
With these settings all your changes will be reflected in your project.