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Celtic Blue

Benjamin Moore · ES-31

The Analysis

Celtic Blue is a mid-tone slate blue that acts as a neutral anchor for a room. With an LRV of 45.11, it absorbs a moderate amount of light, meaning it won't make a small room feel cavernous, but it won't brighten a dim space either.

This is an ideal candidate for a main wall colour in bedrooms, home offices, or living rooms. It is versatile enough to serve as a calming backdrop for bold art or as a bridge between neutral furniture and darker accents.

LRV 45

History & Origin

While it leans toward a modern, updated aesthetic, its desaturated slate tone mimics traditional pigments found in historic cabinetry and trim. It bridges the gap between classic heritage palettes and contemporary interior trends.

Undertoneneutral
FamilyTeal

How to Use It

Pair this with light oak wood tones to soften the blue, or use matte black hardware to emphasize its modern edge. It works best in rooms with consistent lighting to prevent the grey undertones from appearing too muddy.

The Mood

This shade feels grounded and steady, providing a restful backdrop that doesn't demand constant attention. It is a reliable choice for areas where you want to maintain a calm, clean, and professional atmosphere.

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.

  • Intercoastal Gray

    Behr · MQ5-23

  • Shaved Ice

    Behr · N490-3

  • Driftwood Blues

    Valspar · V138-3

  • Shadow Blue

    Behr · N480-3

  • Manor Blue

    Benjamin Moore · 1627

  • Granite Fog

    Valspar · 8006-8C

Lighting

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

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