COMPLEMENTARY: This is an example of complementary colors in an interior space. The wall surrounding the stairs is yellow, and the stars themselves are purple. Yellow and purple are complementary colors.
Art nouveau railing at the entry of the dressing rooms in the Theater on the Champs Elys?es in Paris, which is famous for being the first theater built in concrete in 1913 w/ art nouveau style often seen on the tube entrances in Paris. photo via Etsy.