Wire frame colour.

I am working on a model with lots of component meshes. When I press z to change to wire-frame view all these components are shown with a black outline (orange when selected). Is there any way I can make the mesh for one part green for instance and another part pink so I can tell them apart in wire-frame?

you can also find a built on graphicall I think
but probably outdated !

happy bl

This looks like the thing, thanks.