Accent Color
A quick styling tool applying selected key color to several design elements at once.
The new accent color will be automatically applied to several design elements at once (like frames, devider, borders, etc.). To override those general settings for a specific layout element, go to "Advanced" tab and customize that section individually.
and select Background tab.
Reset the current settings and use the built-in color picker to choose the new primary accent color for your theme.
To reset the styling and revert to the default settings, click the reset background and colour to theme default link at the bottom of the section.
go to Advanced ⟶ Backgrounds