Choose between 4 colors; Lead, Fern, Bluebell or Chocolate.

It’s not technically a retexture, because in the case of plaques the color is not (mainly) determined by the texture map but by vertex colors which are properties of the mesh.
Vertex colors can be edited in nifskope, but the process is tedious. Yes, this is what I have done.

Installation:
Extract archive. Choose one of the color folders, paste the contents (i.e. the "meshes" subfolder) into your Skyrim Data folder.

To uninstall, simply remove the wrplaque01.nif mesh that this mod adds.

This mod currently does not change the color of the combined weapons-and-shield plaque.