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HeritageSouth-Facing

Cook's Blue

Farrow & Ball · 237

The Analysis

Cook’s Blue is a mid-tone, saturated blue that adds significant weight and presence to a room without feeling dark. Because of its relatively low Light Reflectance Value (LRV) of 25.92, it absorbs a fair amount of light, which makes the space feel more enclosed and intimate rather than large and airy.

It acts as a strong, assertive backdrop rather than a subtle neutral. It is best used as a primary wall colour in rooms where you want to make a deliberate statement, or as a high-contrast accent in cabinetry or millwork.

LRV 26

History & Origin

This is a classic 'heritage' blue, frequently found in historic British architecture. It mimics the look of traditional lead-based paints, making it a reliable choice for period properties or homes aiming for a timeless, architectural look.

Undertonecool
FamilyBlue

How to Use It

It pairs beautifully with warm wood tones like oak or walnut to balance the coolness of the blue. For finishes, stick to unlacquered brass to add warmth, or matte black hardware to lean into a clean, modern aesthetic.

The Mood

This shade provides a grounded, stable feeling that works well for daily focus or relaxation. It is a clean, non-moody blue that feels crisp and structured, offering a sense of order without the restlessness of brighter tones.

Colour harmonies

Complementary

Opposite on the colour wheel — bold, high-contrast pairings. Use for a feature wall or furniture you want to command attention.

Analogous

Neighbouring hues — cohesive and calm, great for layered schemes that feel collected rather than matched.

Split complementary

Near-opposites for strong contrast with a little less tension than a pure complement. A favourite of interior designers.

Triadic

Three evenly spaced hues — balanced, vibrant, and versatile. Keep one dominant and use the others sparingly.

Tetradic (square)

Four hues in a square on the wheel — rich, dynamic palettes. Best when one colour leads and the others accent.

Monochromatic

Dark, mid, and light steps on the same hue — a failsafe gradient for trim, walls, and accents without shifting colour family.

Brand Matches

Perceptually similar colours from across all brands in our database.

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    Dulux

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    Colourtrend

  • Blue Dragon

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  • Mariner's Tale

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  • Brittany Blue

    Behr · M510-4

  • Sapphire Springs 5

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Lighting

See how this colour shifts across natural and artificial light conditions.

  • Natural
  • Morning
  • Afternoon
  • Evening
  • Overcast
  • 2700K
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