Understand colour basics and the colour wheel, including primary, secondary and tertiary colours, hue, tone and saturation, warm and cool temperature, and complementary and harmonious relationships

What this dot point is asking

SEAB wants you to understand the basics of colour and the colour wheel: how colours are organised, the three properties of any colour, and the key relationships between colours. You should know the primary, secondary and tertiary colours, the difference between hue, tone and saturation, the idea of warm and cool temperature, and what complementary and harmonious schemes do. The central insight is that colour is not random. The colour wheel is a simple map that lets an artist predict how colours will behave together and choose them deliberately for a particular effect.

The answer

The colour wheel: primary, secondary and tertiary

The colour wheel organises colours into a circle so their relationships are easy to see. It is built up in stages. The primary colours, red, yellow and blue, cannot be mixed from other colours, and everything else is made from them. Mixing two primaries gives a secondary colour: red and yellow make orange, yellow and blue make green, blue and red make violet. Each secondary sits between its two parent primaries. Mixing a primary with the secondary beside it gives a tertiary colour, such as red-orange or blue-green, filling the gaps and completing the wheel.

Hue, tone and saturation

Any colour has three properties, and keeping them apart is important. Hue is the name of the colour (red, blue, green). Tone (value) is how light or dark that colour is, so a pale pink and a deep maroon share the hue red but differ in tone. Saturation (also called intensity or chroma) is how pure and vivid the colour is, from a bright, fully saturated hue to a dull, greyed-down, desaturated version. A single hue can therefore appear in countless forms depending on its tone and saturation.

Warm and cool temperature

The wheel divides into warm and cool halves. Warm colours, the reds, oranges and yellows, are associated with sun and fire; they tend to feel energetic, lively or intimate, and they appear to come forward toward the viewer. Cool colours, the blues, greens and violets, are associated with water, sky and shade; they tend to feel calm, distant or melancholy, and they appear to sit back. Because of this, temperature is one of the simplest ways to create both mood and a sense of depth.

Complementary and harmonious relationships

The wheel reveals two key relationships. Complementary colours sit opposite each other (red and green, blue and orange, yellow and violet). Placed side by side they make each other look brighter and more vibrant, creating energy or tension; mixed together they dull toward grey or brown. Harmonious or analogous colours sit next to each other (blue, blue-green, green). Sharing qualities, they blend comfortably and create a calm, unified feeling. Choosing between contrast and harmony is one of the artist's main colour decisions.

Examples in context

Example 1. A complementary poster. A bold advertising poster often uses a complementary pair, such as orange against blue, to make the main subject leap off the page. The opposite colours intensify each other, so the design grabs attention from a distance, a clear, everyday use of the colour wheel's most powerful relationship.

Example 2. Georgette Chen's balanced palette. The pioneering Singapore artist Georgette Chen, a key Nanyang School figure, used carefully balanced, often slightly muted colour in her portraits and still lifes of tropical subjects. Her controlled, harmonious palette with gentle warm and cool relationships gives the works a poised, dignified calm, showing how considered colour choices, rather than the loudest hues, build mood.

Try this

Q1. Name the primary and secondary colours, and explain how the secondaries are made. [3 marks]

• Cue. Primaries are red, yellow and blue; secondaries are orange (red plus yellow), green (yellow plus blue) and violet (blue plus red), each made by mixing two primaries.

Q2. Explain the difference between hue, tone and saturation. [3 marks]

• Cue. Hue is the name of the colour, tone is how light or dark it is, and saturation is how pure or vivid it is, so one hue can appear in many tones and at many levels of saturation.

Q3. What happens when complementary colours are placed side by side, and when they are mixed? [2 marks]

• Cue. Side by side they intensify each other and look vibrant; mixed together they dull each other toward grey or a neutral brown.