Hi Paul

Thanks for posting to Lucidchart Community! Lucidchart does support import of SVG files. Our SVG file import feature allows users to easily create custom shape libraries inside Lucidchart. Here is an article on using SVG files within Lucidchart. Once you have imported the SVG file you should be able to customize and change the color of the lines as a shape. However do note that SVG file importing is a premium feature and you will need to upgrade your subscription to have access. 

Please let me know if you have any further questions!