You can change the color theme and font from the item's design settings section by editing or creating a new Theme:
Color theme
You can select a color theme from a large list of built-in themes or create your own custom color theme to perfectly match your brand. For each theme, you can choose Background color, Text color and Vote bars, links & buttons color.
Font
You can select from an extensive list of built-in fonts or add your own custom font using our CSS override feature.
Important note: Please make sure to Save the item to reflect any Theme changes.