I sometimes want to split strips or sections with a simple line of various thickness.
Shape Dividers is an easy way to make sure there’s a line at the bottom of each section, both on desktop and mobile – but there are no straight lines!
Instead I have to add lines to the page and spend a lot of time to make it fit both on desktop and mobile sites.
X
I believe there is an option to add custom shapes in the shape divider as well(at least in the Wix Studio there is), you can use a line there.
Hmm, doesn’t work in the normal editor
You can use SVG vector image.
Do you have an example? None of the vector images from media library have a line at the bottom
There’s a section about “Designing a custom shape divider” here - Wix Editor: Adding and Customizing Shape Dividers | Help Center | Wix.com 
I’m able to upload the perfect svg with a color of #00000 and all that, yet still wix makes the color white and doesn’t allow me to change the color.