Hello @jennifersimsdesign-com-au,
To change the border color of the widgets and the border lines in between the links, please add the following custom CSS in your Admin Dashboard > Appearance > Customize > Additional CSS :
.sidebar .widget {
border: 1px solid #000;
}
.sidebar ul li {
border-top: 1px solid #000;
}
The CSS will change the color of the widget border and the link border respectively.
You can replace the “#000” color code with the color code of your choice. For reference on color hex code please see the link here : http://www.w3schools.com/colors/colors_picker.asp
Hope this Helps,
Best Regards !!