The real building is painted white. I mixed various light grays of pale pink, blue, yellow. I put blotches of that on first and followed up the next day with a whiter tone to give it more texture. No building is all white, with reflections from the sky, overhangs, sidewalk and other surroundings, it is a much more exciting variety of colors. It was an overcast day so not much in the line of shadows. For the street sign, I covered it with indigo first and then scratched out the name using a pointy tool.