Hello Alessandro Colinucci,
I am a user of OxyWireframe and so far I love it.
it works and does the job pretty well. However IMHO I think the color management system may be optimized further.
I wonder if we can implement the use of this wonderful color system explained by Kevin Geary in his post:
It uses HSL, in addition to the various pros mentioned in the video, it’s pretty easy to change. If we can apply it to OxyWireframe that would be wonderful, otherwise please consider it as a feature request.