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IndustrialSouth-Facing

Neptune Blue

Behr · 570D-6

The Analysis

Neptune Blue is a deep, muted slate blue that absorbs a significant amount of light due to its low LRV of 14.74. It will make a room feel smaller and more enclosed, which is effective for creating a cozy, high-contrast environment.

This shade works best as a bold, moody accent wall or for cabinetry. If used on all four walls, it acts as a dramatic backdrop that commands attention without being flashy.

LRV 15

History & Origin

This is a modern interpretation of a classic naval or nautical palette, often found in traditional studies or libraries. It leans toward a sophisticated, contemporary aesthetic rather than a specific period-style reproduction.

Undertonecool
FamilyBlue

How to Use It

Pair this with warm wood tones like walnut or oak to balance the coolness of the blue. For hardware, matte black provides a seamless, modern look, while aged brass adds a sharp, high-end contrast.

The Mood

Because of its dark, grounded nature, this color feels inherently restful and stable. It avoids the agitation of bright primary colors, making it an excellent choice for rooms where you want to signal to your brain that it is time to slow down.

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.

  • Veranda Blue

    Valspar · 4004-6B

  • Shipyard

    Behr · S500-6

  • Bedford Blue

    Benjamin Moore · 1679

  • Niagara Blues 1

    Dulux

  • Denim

    Sherwin-Williams · SW6523

  • Inky Blue

    Sherwin-Williams · SW9149

Lighting

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

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