Double complementary colour schemes, also called tetradic colour schemes, are a very interesting and underused way to play with colour. This elusive colour combo is created when two adjacent complementary colour schemes are put together. Each combination consists of two primary and two secondary colours.
The best way to explain this mysterious colour scheme is by demonstrating it. Imagine red as the primary colour with its complement green as the root of your combination. To complete the tetradic combination you would add the secondary colour of orange and its complement blue: red, green, orange, and blue. Conversely, instead of adding orange and blue to the red and green root you could add purple and its complement, which is yellow: red, green, purple, and yellow.
If you are looking at a…
