Neptune Seas
Dulux
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The Analysis
Neptune Seas is a mid-to-deep blue-green with a low LRV of 17.07, meaning it absorbs most light rather than reflecting it. This creates a cozy, contained atmosphere that can make a large room feel more intimate or a small room feel enclosed.
This colour works best as a primary wall choice in bedrooms or studies, or as a bold accent on built-in cabinetry. It serves as a strong, sophisticated anchor that prevents a room from feeling washed out or overly sterile.
LRV 17History & Origin
It leans toward a modern, updated classic look rather than a strict historical period piece. Its complexity makes it feel fresh and relevant in contemporary homes that prioritize depth over plain white walls.
How to Use It
Pair this shade with warm wood tones like walnut or oak to balance the coolness of the green. For hardware, matte black provides a sharp, modern contrast, while unlacquered brass adds a classic, warm touch.
The Mood
Because of its muted, earthy undertones, this colour is inherently restful and grounding rather than energizing. It provides a stable, calm backdrop that is excellent for high-stress areas where you want to signal to your brain that it is time to relax.
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.
Add harmony palette to a room
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Brand Matches
Perceptually similar colours from across all brands in our database.
Lighting
See how this colour shifts across natural and artificial light conditions.
- Natural
- Morning
- Afternoon
- Evening
- Overcast
- 2700K
- 3500K
- 4000K
- 5500K