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IndustrialSouth-Facing

Endless Sea

Sherwin-Williams · SW9150

The Analysis

Endless Sea is a deep, moody blue that absorbs a significant amount of light due to its low Light Reflectance Value (LRV) of 8.78. Because it reflects so little light, it will make a room feel more intimate and enclosed rather than bright or airy.

This colour is best used as a bold accent wall or a dramatic choice for a small, dedicated space like a study or powder room. If used on all four walls, it creates a 'jewel box' effect that highlights decor rather than acting as a neutral backdrop.

LRV 9

History & Origin

This deep blue is a modern interpretation of traditional library or formal dining room colours. It leans toward contemporary, sophisticated design rather than vintage or period-specific styles.

Undertonecool
FamilyBlue

How to Use It

Pair this with warm wood tones like walnut or light oak to balance its coolness, and use matte black or brushed brass hardware for a sharp, clean finish. It works exceptionally well in rooms where you want to hide architectural imperfections or create a high-contrast look.

The Mood

This shade promotes a grounded, restful environment perfect for winding down. It feels serious and stable, making it a great choice for spaces where you want to eliminate visual clutter and find focus.

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.

  • Summer Nights

    Benjamin Moore · 777

  • Blue Danube

    Benjamin Moore · 2062-30

  • Quiet Storm

    Behr · S-H-540

  • Deep Twilight Blue

    Valspar · 4007-6C

  • Shasta Lake

    Behr · M490-7

  • Indigo Shade

    Dulux

Lighting

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

  • Natural