You can set the base Theme for the website. Click the "Theme" option to open its settings panel.
The Theme panel provides for the following actions:
Clicking the theme name opens a pop-up window of pre-built themes to choose from.
The "Reapply Theme" button will apply any changes from the other theme options used.
See Theme for more details.
Add Theme Color
Clicking this opens a pop-up within with a selection of items you can set specific colors for.
See Add Theme Color for more details.
Add Custom Variable
Clicking this allows you to add custom variables to be used with the theme.
See Add Custom Variable for more details.
Clicking this will pop-up the "Add Style" options available.
See Add Style for more information.