Thats the problem. only those selected edges should be a particular color, I have been using the forgotten tools selection sets:
It would have been great if we can assign colors to the selection sets for edges but unfortunately the talented dev seems to have stopped development of the addon. Maybe another kind dev can fork it and add it? Its a great addon and my immense thanks to the dev for making this available for others to use
This is something we should have natively in Blender tbh.
