System-->Configuration-->Theme Full-Width
Press the "Reset" button; you can always go back to the original color settings. If the color changes to the frontend do not appear, we recommend updating your browser cache and clearing the cache CSS "Flush JavaScript / CSS Cache" on the cache management page.
Main colors
Menu background
Menu font colors
Custom CSS (for advanced users)
In this field you can set custom CSS.
For example, styles for "Template Features" button from our demo. Styles for the selected button should point ID of the category. In our example, ID of the category is 28.