This is the sidebar settings of your Styling Option.
Custom Sidebar Style
You can choose to disable or enable your custom sidebar style. Enabling this will show more options in styling further your sidebar. Disabling this will just follow the default settings of your sidebar.
Sidebar Widget Title Color
You can set your sidebar widget title color.
Sidebar Widget Text Color
You can set your sidebar widget text color.
Sidebar Widget Link Color
You can set your sidebar widget link color.
Sidebar Widget Link Hover Color
You can set your sidebar widget link hover color.