I was just reading this post & thought I would have a look through some of my photos to find how I use colours on the colour wheel.
This front section of a beetle is an example of a triadic colour scheme. Red, yellow, blue- the primary colours- all equally spaced on the colour wheel.
I wonder if this is too- with the red & blue of Charlies' clothes and the yellow(?) of the sand.
This lavender below with the orange flower background and a hint of green is also triadic except with secondary colours.
And I'm not really sure about this one...purple, green & brown (& sand)?
There are so many colour combinations....check out Kat Sloma's Exploring with the camera to find some really great explanations of how all the colours fit together.