In the Site Styles section of the Design Center’s Control Panel, you can set the default colors and fonts for all of the pages in your site at once, including the title and navigation bar, site background, page and section headings, and the paragraph text. This eliminates the tedious process of setting colors or styles for each box or page of your site.
For example, under Paragraph Text, if you set the Body Text to the font Roboto, the Text Color to a dark gray, and the Links Color to an orange, when you add a Text/Media box to any of the pages in your site, these will be the default styles that box will come with.
You can override any of these styles by setting specific fonts or colors within a Text/Media box. These style edits will only affect the content in that particular box.