Colour is one of the most powerful tools in any artist's repertoire. Whether you're drawn to bold, contrasting palettes or soft, harmonious tones, understanding colour theory can transform the way you see and create art. 
The Colour Wheel
At the heart of colour theory is the colour wheel, first developed by Sir Isaac Newton in 1666. It organises colours into three groups:
- Primary colours – Red, yellow, and blue. These cannot be created by mixing other colours.
- Secondary colours – Orange, green, and violet. These are made by mixing two primary colours.
- Tertiary colours – Created by mixing a primary and a secondary colour, such as red-orange or blue-green.
Colour Harmony
Colour harmony refers to the pleasing arrangement of colours. Some of the most common harmonies include:
- Complementary – Colours opposite each other on the wheel (e.g. blue and orange). These create high contrast and visual energy.
- Analogous – Colours that sit next to each other (e.g. red, red-orange, orange). These feel natural and cohesive.
- Triadic – Three colours evenly spaced around the wheel. These offer vibrant, balanced contrast.
Warm and Cool Colours
Colours are often described as warm or cool. Reds, oranges, and yellows feel warm — they evoke energy, passion, and sunlight. Blues, greens, and purples feel cool — they suggest calm, depth, and shadow. In painting, warm colours tend to advance (appear closer), while cool colours recede, a principle that's invaluable for creating depth and atmosphere.
Colour in Fine Art
Masters like Monet, Matisse, and Rothko each used colour theory in distinct ways — from Impressionist dabs of complementary colour to Fauvism's bold, expressive hues. Understanding these principles doesn't limit creativity; it gives you a foundation from which to experiment with confidence.
Whether you're a collector, a student, or simply someone who loves art, seeing colour through this lens adds a whole new layer of appreciation to every painting you encounter.
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