Ontario K–8 curriculum · Glossary

complementary colours

Definition

Complementary colours are pairs of colours that are opposite each other on a colour wheel, like red and green, and when put together, they make each other look brighter.

Placing a red apple on a green background makes the red look brighter because they are complementary colours.

How to teach this in 30 seconds

Try this analogy: Complementary colours are like players on opposite sports teams whose jerseys make each other look extra bright when they stand side-by-side.

Ask your child: What colour could you put next to this red to make it really pop?

Common mix-up: Kids often think 'complementary' just means colours that look nice together. They are actually specific pairs of opposites on the colour wheel that create the strongest contrast.

Examples

  • A sports team using blue and orange for their logo to make it stand out.
  • A yellow flower looks very bright against a deep violet background.

complementary colours is a term used in Ontario’s Kindergarten to Grade 8 curriculum.

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