Fear of colour is one of the most common reasons interiors remain safe and forgettable. The rooms that are remembered — the ones that guests photograph, the ones that stay in the mind years after a visit — almost always have a clear, committed point of view about colour. This guide gives you the tools to form that point of view with confidence.
The 60-30-10 Rule
The 60-30-10 rule is the most widely used colour-balancing principle in interior design. It works as follows: 60% of the room's visual area (typically walls, large upholstery and flooring) should be the dominant colour; 30% (typically secondary upholstery, curtains and furniture) should be the secondary colour; 10% (accessories, cushions, artwork and decorative objects) should be the accent colour.
The rule works because it creates hierarchy. Rooms without hierarchy — where every colour competes at equal volume — feel chaotic regardless of how beautiful the individual colours might be. Rooms with hierarchy feel resolved even when the palette is complex.
Introduce the accent colour through cushions, candles, vases, trays and decorative objects — these are the easiest and most reversible colour decisions in a room.
Understanding Undertones
Every colour has an undertone — a secondary hue that shifts its character in relation to other colours and to natural light. White walls can read as pink, yellow, green or blue depending on their undertone and the light in the room. Understanding undertones is what separates colour choices that look right in the paint shop but wrong at home from those that succeed in situ.
The practical approach: test at least three paint samples in large swatches on the actual wall, viewed in morning light, afternoon light and evening artificial light. The colour that works in all three conditions is the right one. The colour that works only in the paint chip is not.
Undertones interact with the metals and finishes already in the room. Warm undertones in walls work naturally with brass and gold. Cool undertones work with chrome and silver. This is why getting the metal palette right before the paint colour is chosen — or vice versa — matters. See our guide to mixing metals.
Colour by Room
Living room: The most flexible room in the house for colour. Both warm (terracotta, ochre, warm white) and cool (sage, slate, navy) palettes work well. Anchor with a statement rug whose palette can guide the entire room's colour story. See the living room styling guide.
Bedroom: Receding, calming tones — warm whites, pale greys, dusty blues, sage greens — support sleep and rest. The bedroom is not the place for visual excitement through colour. See the luxury bedroom design guide.
Dining room: Deep, saturated tones work beautifully. Forest green, navy, deep burgundy, warm charcoal — colour that makes the room feel enclosed and theatrical at dinner. See the dining room design guide.
Kitchen: Neutral-dominant palettes with a single colour accent on cabinetry or splashback. The kitchen is a functional room that benefits from visual clarity; save the dramatic colour for an accent zone.
Hallway: A bolder colour choice works well in hallways — the space is briefly occupied, not lived in, so a strong statement reads as confident rather than overwhelming. See the entrance hall guide.
The Case for Dark Walls
Dark walls are among the most misunderstood choices in residential colour. The common fear is that they will make a room feel small and oppressive. In practice, dark walls in a room with good lighting create a sense of depth and enclosure that many people find more comfortable and intimate than large, pale rooms. The room feels like a room rather than an unresolved space.
Dark walls work best with: warm lighting at 2700K (see the colour temperature guide), reflective surfaces — mirrors, glassware, metallic accessories — and pale or warm-toned textiles — linen, cushions, drapery in cream or warm neutrals.
Introducing Colour Through Objects
The most reversible way to introduce colour into a room is through decorative objects. A set of cushions in a new accent colour can completely refresh a room in minutes. A vase in a saturated tone introduces colour without commitment. A throw in a different palette tests a colour direction before it goes on the walls.
Paintings and prints are the most powerful way to introduce complex colour into a room — a single piece of art can establish an entire colour story. See how to buy art for the home.
Frequently Asked Questions
- What is the 60-30-10 rule in interior design?
- 60% dominant colour (walls, large upholstery, flooring), 30% secondary colour (curtains, furniture), 10% accent (cushions, vases, objects). The rule creates visual hierarchy so a room feels resolved rather than chaotic.
- What colours make a room look bigger?
- Light cool tones — pale greys, soft whites with blue or green undertones. Mirrors and reflective surfaces amplify this effect significantly.
- Are dark walls a good idea in a small room?
- Yes, with good artificial lighting. Dark walls create depth and cosy enclosure. Pair with mirrors, metallic surfaces and warm-toned textiles. See our colour temperature guide for the right lighting.
