Excel 2019 Custom Style Lines

Is it possible to add to or change the collection of Line Styles in Excel 2019? For example, there are line styles solid, "dash, dash, dash", "dot, dot, dot", and "dash, dot, dash, dot". Can I create a style like "dash, dash, dash, dot, dot, dot, dash, dash, dash"? Specifically there is a Line Style "dash, dot, dash, dot, dash dot"  but appears to be in Italics & Bold. I would like to create this Line Style with Italic and not bold. 

Any help would be appreciated.

Thank you