I would think that a "No white fences" law would be unconstitutional no matter what division of government passes it (whether federal, state, or local). Unless

I would think that a "No white fences" law would be unconstitutional no matter what division of government passes it (whether federal, state, or local). Unless there was some pressing public safety need (i.e. "White fences are a breeding ground for the white-fence-virus") I don't think any such law would stand up to a constitutional challenge under the same freedom of expression challenges that protect art from government censorship.