To understand what I am asking, if you look at my attachment…

…you will see towards the far right, that both the text and background words, have empty circles with a line going across them. I already know how to add custom colors to my custom color palettes. But I don’t know how to modify these 2 empty circles. How can I replace these two empty circles for actual colored circles (presentation purposes).

Is this something that can be incorporated into our theme.json file?