When I read this back in January, I thought why red color; what is the significance of red color in this case. Our discussion on redlining made it clear. It is a sign of racial discrimination. It's very unfortunate to witness this even in today's world. Please read: http://www.theguardian.com/uk-news/2016/jan/20/asylum-seekers-north-east-claim-identifiable-red-doors-houses

http://www.bbc.com/news/world-europe-35326090

http://www.theguardian.com/uk-news/2016/jan/24/asylum-seekers-made-to-wear-coloured-wristbands-cardiff