The latest instalment in this thread calls for examples of analogous colours – in other words, ones that are adjacent on the colour wheel:
The most common mnemonic to help with remembering the ‘proper’ sequence of colours in the spectrum is ‘ROYGBIV’: red, orange, yellow, green, blue, indigo and violet. Here are some images that put together good neighbours.
Two examples here: a flower from Monet’s Garden in Giverny and a selection of flowering courgettes from the Rialto Market in Venice
A bright blue dragonfly on a green leaf (from my garden pond)
My grandson sitting at the top of a slide at his pirate-themed second birthday party
Finally, this is an electronic display in The Mall of The Emirates in Dubai. The colours actually cycle through the whole spectrum