I doubt the inventor of terracotta roof tiles used a colour wheel to ensure they are the complementary colour to a clear blue sky, but they are. Just as red berries are set off by complementary green leaves (to make them look more delicious to animals that will eat them and spread their seeds), so nature has ensured clay roof tiles complement the sky (at least on most days). Presumably nature does this to make us like roofs? (Or is it rooves?)
I used Michael Harding’s Cerulean Blue for this quick sketch of the roof. It is staggeringly pricey, but worth every cent. Yes, the chimney is wonky in this picture, but that is because the chimney is wonky (at least that is my excuse).
I did this painting of a mollusc’s roof ages ago. I was only happy with half of it, so I repainted the other half to provide a better context for the better half. Much as I like a red tile roof, this very old and dusty shell is a much more beautiful roof. However, it turns out we MUST leave these at the beach; apparently every shell we take does that little bit more damage to the sea.