Use the colour wheel to identify primary, secondary and tertiary colours, mix colours from a limited set, and understand warm, cool and complementary relationships

What this dot point is asking

SEAB wants you to understand the colour wheel and to use it to mix colours and choose colour relationships. The colour wheel is a simple map of how colours relate, and once you can read it you can mix almost any colour from a few tubes, make colours brighter or duller on purpose, and choose combinations that work. This is essential for painting and gives you the vocabulary to discuss colour in the written paper.

The answer

Primary, secondary and tertiary colours

• Primary colours are red, yellow and blue. They cannot be made by mixing other colours, but all other colours can be mixed from them.
• Secondary colours are made by mixing two primaries in roughly equal amounts: red and yellow make orange, yellow and blue make green, blue and red make purple.
• Tertiary colours are made by mixing a primary with the secondary next to it, giving in-between colours such as red-orange or blue-green.

These sit in order around the colour wheel, so the wheel shows at a glance how colours are made and how they relate.

Warm and cool colours

The wheel divides into warm colours (reds, oranges, yellows) that feel hot, energetic or close, and cool colours (blues, greens, purples) that feel calm, cold or distant. Knowing which side a colour comes from helps you set a mood and create depth, since cool colours tend to recede and warm colours tend to come forward.

Complementary colours

Complementary colours are pairs sitting opposite each other on the wheel: red and green, blue and orange, yellow and purple. They do two opposite jobs. Placed side by side, they create strong contrast and make each other look more vivid. Mixed together, they dull or neutralise each other, which is how you make natural greys and browns and tone down a colour that is too bright.

Lightening, darkening and dulling

To control a colour you usually do three things: add white to lighten it (making a tint), add a little black or a dark colour to darken it (making a shade), and add a touch of its complementary to dull it toward a natural grey. Mixing from a limited set, the three primaries plus white, teaches this control far better than relying on lots of ready-made tubes.

Examples in context

Example 1. A sunset using warm and cool. A painter shows a glowing sky with warm oranges and reds and contrasts it with cool blue-purple shadows on the land. The warm and cool split creates both mood and depth, the warm sky advancing and the cool ground settling back, all explainable through the colour wheel.

Example 2. Complementary contrast in a market scene. A painting of red chillies piled against green leaves uses a complementary pair to make both colours sing. The red looks redder and the green greener because they sit opposite on the wheel, a clear example of complementary contrast making a subject pop.

Try this

Q1. Name the three primary colours and the secondary colour each pair makes. [3 marks]

• Cue. Red, yellow and blue are the primaries; red and yellow make orange, yellow and blue make green, blue and red make purple.

Q2. Explain what complementary colours are and one way to use them. [2 marks]

• Cue. Complementary colours sit opposite on the wheel (red and green); placed side by side they create strong contrast and look brighter, or mixed together they dull each other.

Q3. Describe how you would lighten and how you would dull a bright colour. [2 marks]

• Cue. Add white to lighten it (a tint); add a tiny touch of its complementary colour to dull it toward a more natural grey or brown.