You mean when you are in solid mode and then set the display of a specific object to “wire” in the object properties?
I think you are correct. This can not be changed via addon and requires a patch to Blenders source code.
I agree that it would be good to have.
Yes, that’s what I meant.
Well, Luke’s & holograms, IT IS DONE !! All praises to the developer who submitted a nice pach & was accepted by blender Dev’s. 
Interesting. Can you post a link to the patch?
Hey,
Ref > https://projects.blender.org/blender/blender/pulls/111502
Version 4.0 Build > https://builder.blender.org/download/daily/
I moved the addon over to gumroad for easier access.
This works now in Blender 4.0.
Here are a couple of variants for different wireframe color and object color settings. You have to set up the viewport like in the images bolow::
The Wire Frame Color Tools Addon has been available as extension for Blender 4.2 and up for a while on the Blender Extensions website:
Hi,
Very useful, thanks for sharing 
