Many homeowners cover their electrical main panels with pictures, enclosures, or paint the same color as the wall. Electrical codes do not allow any of these practices. In reality, the "code police" are not going to show up and issue a ticket. Regardless of code, you want the panels visible and easily accessible in case of emergency. You need to think of fire fighters, renters, or guests that might not have any idea where the main panel is hidden. Is it really worth the risk to be cosmetically appealing to hide a panel?
I am a full-time home inspector servicing all of South Carolina.