As a Profesional remodeler, yes they should all be the same color throughout the home unless you have a theme room calling for a different color to conceal or make a statement.

Link to OrdinanceWhat they are trying to prevent is this:A Mexican national pleaded guilty Monday in federal court to his role as operator of a human smuggling stash house in Phoenix"The property was used to conceal undocumented noncitizens as part of a transnational human smuggling operation in which foreign nationals were smuggled across the U.S.

In order to go after the seller you are going to have to prove that they knew about it and concealed it which is just about impossible. 

A couple of court cases I assisted in defending the Subject To buyer, Included :Accusations of Forgery, Bank Fraud, Wire Fraud, Financial Schemes, Identity Theft, Concealment, Equity Skimming, violation of the Consumer Protection Act and Money Laundering.

The Supreme court was clear that its not fraud to violate a due on sale and other lesser courts have said you cant be sued for intentionally trying to conceal a sale because you have no duty to notify them. 

When we do a complete interview, we expect the borrower to be transparent and completely honest so we can better help them and assist them and not conceal information.

Anyone with tats on hands, neck, face or head has a problem in my opinion and I prefer not to take a chance so I will reject them.Tats that are easily concealed so as to allow the person to live a normal life I will need to know more about that person before I reject or accept.

(It takes a really experienced/knowledgeable HI to spot when a house isn't grounded properly when someone has already taken steps to conceal the fact...)

As Mike says, many RE investors carry concealed firearms.I charge a high screening fee (for around here) of $35 so I know my low-income tenants are serious if they pay it -- plus I tell them it is non-refundable if they lie on the form or don't fill it out completely.Also, when I show a property I usually go with my partner who is an ex-school teacher and a good judge of both adults and children.

No permit needed to conceal carry.