Mountain River
Valspar · 4005-6C
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The Analysis
Mountain River is a deep, muted blue-grey that absorbs light rather than reflecting it. Because of its low LRV of 8.96, it will make a room feel more enclosed and intimate, effectively shrinking large, cavernous spaces to make them feel cozy.
Due to its intensity, this is best used as a bold accent color or a high-drama choice for a library or media room. It can work on all four walls if you lean into a moody, immersive look, but it is too heavy to function as a neutral backdrop.
LRV 9History & Origin
This shade leans into a modern, sophisticated aesthetic rather than a traditional period look. Its clean, cool undertones align well with contemporary design trends that favor sharp contrasts over historical palettes.
How to Use It
Pair this with warm wood tones like walnut or teak to balance the cool blue, and use brass or brushed gold hardware for a high-end finish. It works best in rooms with high-quality task lighting or plenty of lamps to prevent the space from feeling like a cave.
The Mood
This color provides a grounded, stable, and highly restful environment. It is ideal for spaces where you want to signal to your brain that it is time to slow down, making it excellent for relaxation rather than high-energy activities.
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