Switch to theme_boost Change the "theme_boost | brandcolor" colour, and verify the colors of the theme links change (and other things) Define a different colour in the "theme_boost | scsspre" setting like this: $brand-primary: red; Verify that the theme links are now always "red" regardless of theme_boost | brandcolor" colour setting. Define a different colour in the "theme_boost | scsspre" setting like this: $brand-primary: yellow !default; Verify that the theme links are now "yellow" if theme_boost | brandcolor" colour setting is empty, but otherwise reflect the colour of that setting. Define another variable in the "theme_boost | scsspre" setting and see it take effect ($border-radius: 50%). Put a SCSS comment in the "theme_boost | scsspre" setting and verify the other variables still have an effect. Declare an unused variable in the Define a style rule in the "theme_boost | scsspre" setting $snot-colour: green; Add a SCSS rule to the "theme_boost | scsspost" setting that uses the variable body { background-color: $snot-colour ! important; } Marvel at your creation.