I have to add something, it´s not correct, or I left it open. Because: Only to have color on the wall is not enough. I don´t want to have a commercial of the Citybank or of Mercedes or whatever there. .... So there is much more. It´s not only about the "color". It´s about how it came to the wall. I had to add this. Because a big "colored" addvertisment can hurt your eyes even more than a grey wall.