Understanding Colour Theory for Interior Design: A Practical Guide | D&D Interior Services Blog
Colour theory provides a framework for predicting how colours work together. Applied to interior design, it makes the difference between a room that feels intentionally designed and one that feels random.
The colour wheel organizes colours by relationship. Analogous colours (adjacent on the wheel) create harmony and calm. Complementary colours (opposite on the wheel) create vibrant contrast and visual interest.
Key Considerations
The 60-30-10 rule is the most practical colour allocation guideline for rooms: 60% of the visual field (walls) in the dominant colour, 30% (furniture and soft furnishings) in a secondary colour, 10% (accessories and accents) in an accent colour.
Undertones affect how colours interact. Two whites that look identical on a chip can clash dramatically when used together — one may have yellow undertones, the other pink. Pulling undertones from one element (a floor, a stone countertop) and repeating them throughout creates cohesion.
Getting Started
Light direction affects colour perception. North-facing rooms receive cool, indirect light that amplifies cool undertones. South-facing rooms receive warm, intense light that brings out warmth in paint colours. What works in a south-facing space may feel cold in a north-facing one.
Value contrast — the difference in lightness between colours — determines how much visual 'pop' a room has. Low contrast (similar values) creates quiet, sophisticated interiors. High contrast (dark against light) creates energy and drama.
Create a physical reference sample board before committing to colours. Assemble paint chips, fabric swatches, flooring samples, and cabinet door samples together under the actual room's lighting conditions to evaluate the palette as a complete system.