Well, the pink building's owners probably didn't get a permit to paint, therefore no 'restrictions' as to color. Now, if the city doesn't approve of the color, they could be subject to a fine. This sadly is the way some people are going because the city makes it so difficult to do anything. You have to pay for so many permits, and there are so many restrictions...or you build it the way you want (or in this case, paint it the color you want) then pay a $500 fine for not getting permits and be done with it.