This one is a little stranger than it sounds. The best way to think of complimentary colors is to think of “color echoing,” as a synonym. In other words, you choose one color that you like and then “echo” it in the other colors in the garden or the container combination.
It’s really easy to see how I have done that with this container. I took the white begonia–or the white container, for that matter–and I “echoed” the white ribs in the leaves of the alocasia and the white variagation of the creeping ficus.
It’s a little harder–but not impossible–to do in a garden.
This is some perennial begonia, growing out for the cracks in my slate steps. It’s backed by a red Japanese maple–and for some extra color, I have a couple of burgundy mums up there on the top of the slate wall.
Another container, this time with mostly perennials (the monkey grass doesn’t over winter for me but the coral bells have–for 7 years!)
So that should give you some idea of how “color echoing” works. Give it a try!