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IndustrialSouth-Facing

Celestial Blue 4

Dulux

The Analysis

Celestial Blue 4 is a deep, saturated mid-tone that absorbs more light than it reflects, given its low LRV of 19.21. It creates a cocooning effect that will make a room feel smaller and more intimate rather than bright and airy.

This is a high-impact colour best used as a bold focal point. It works excellently as an accent wall, a dramatic cabinetry finish, or for a 'drenching' effect where you paint walls and trim the same colour to create a sophisticated, tailored look.

LRV 19

History & Origin

This colour feels contemporary and modern rather than historical. Its clean, sharp saturation fits well with modern architectural lines rather than traditional period-specific interiors.

Undertonecool
FamilyTeal

How to Use It

Use this in rooms where you want to create a mood, such as a home office or a media room. Pair it with warm walnut wood tones to soften the blue, or use matte black hardware and fixtures for a clean, sharp, industrial contrast.

The Mood

This shade provides a grounded, stable atmosphere that feels focused and calm. Because it leans toward a strong, clear blue, it avoids feeling gloomy and instead offers a crisp, refreshing environment for daily living.

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.

  • Wishing Well

    Valspar · 5002-10C

  • METAL BLUE

    Jotun · 5553

  • Deep Blue Sea

    Valspar · 5001-10C

  • Tibetan Turquoise

    Behr · MQ4-53

  • Blue to the Bone

    Valspar · V031-3

  • Hacienda Blue

    Behr · P490-6

Lighting

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

  • Natural
  • Morning
  • Afternoon
  • Evening
  • Overcast
  • 2700K
  • 3500K
  • 4000K
  • 5500K