# Sherwin Williams Sea Mariner

Source: [https://plan-home.com/color/sea-mariner-sw-9640](https://plan-home.com/color/sea-mariner-sw-9640)

Sherwin Williams Sea Mariner SW 9640 is a deep, muted blue-gray with a distinctly cool cast. Its charcoal-like depth keeps the blue restrained rather than bright, giving walls a grounded, shadowy presence. In strong natural light, the blue-gray character is clearer; lower or warmer lighting can make it read closer to softened graphite. Use this shade for a study, dining room, exterior trim, or built-in cabinetry where a dark color can add definition without looking black. Pale oak, brushed nickel, matte black hardware, warm white paint, and light gray stone provide clean contrast alongside Sea Mariner.

## Color details
- **Brand or system:** Sherwin Williams
- **Color name:** Sea Mariner
- **Color code:** SW 9640
- **HEX:** #434a54
- **RGB:** 67, 74, 84
- **LRV:** 6.68%
- **Brightness:** Dark
- **Color families:** Blue
- **Temperature:** cool
- **Undertones:** blue
- **Collections:** Emerald Designer Edition - Rustic + Refined

## Color codes
- **HSV:** Hue: 215° Saturation: 20.24% Value: 32.94%
- **HSL:** hsl(215, 11, 30)
- **CMYK:** Cyan: 20.24 Magenta: 11.9 Yellow: 0.0 Key: 67.06
- **YIQ:** Y: 73.047 I: -7.385 Q: 1.631
- **XYZ:** X: 6.363 Y: 6.731 Z: 9.349
- **CIE Lab:** L:31.186 a:-0.363 b:-6.878
- **CIE Luv:** L:31.186 u:-3.98 v:-8.453
- **Decimal:** 4409940
- **Hunter Lab:** 25.944, -1.621, -3.205

## Equivalent and related colors
- [Benjamin Moore Hale Navy](https://plan-home.com/color/benjamin-moore-hale-navy-hc-154)
- [Benjamin Moore Mysterious](https://plan-home.com/color/benjamin-moore-mysterious-af-565)
- [RAL Classic Grey Blue](https://plan-home.com/color/ral-5008-grey-blue)
- [Behr Secret Society](https://plan-home.com/color/behr-secret-society)
- [Behr Starless Night](https://plan-home.com/color/behr-starless-night)
- [Benjamin Moore Gravel Gray](https://plan-home.com/color/benjamin-moore-gravel-gray-2127-30)
- [Benjamin Moore Baby Seal Black](https://plan-home.com/color/benjamin-moore-baby-seal-black-2119-30)
- [Benjamin Moore Blue Note](https://plan-home.com/color/benjamin-moore-blue-note-2129-30)
- [Sherwin Williams Charcoal Blue](https://plan-home.com/color/charcoal-blue-sw-2739)
- [Benjamin Moore Witching Hour](https://plan-home.com/color/benjamin-moore-witching-hour-2120-30)
- [Behr Dark Denim](https://plan-home.com/color/behr-dark-denim)
- [Behr Night Flight](https://plan-home.com/color/behr-night-flight)
- [Behr Poppy Seed](https://plan-home.com/color/behr-poppy-seed)
- [RAL Classic Graphite grey](https://plan-home.com/color/graphite-grey-ral-7024)
- [Benjamin Moore Black Horizon](https://plan-home.com/color/benjamin-moore-black-horizon-2132-30)
- [Sherwin Williams Cyberspace](https://plan-home.com/color/cyberspace-sw-7076)
- [Benjamin Moore Abyss](https://plan-home.com/color/benjamin-moore-abyss-2128-20)
- [Sherwin Williams Sea Serpent](https://plan-home.com/color/sherwin-williams-sea-serpent)

## Lighter monochromatic colors
- [Sherwin Williams Downing Slate](https://plan-home.com/color/downing-slate-sw-2819)
- [Sherwin Williams Gibraltar](https://plan-home.com/color/gibraltar-sw-6257)
- [Sherwin Williams Granite Peak](https://plan-home.com/color/granite-peak-sw-6250)
- [Sherwin Williams Mineral Gray](https://plan-home.com/color/mineral-gray-sw-2740)
- [Sherwin Williams Distance](https://plan-home.com/color/distance-sw-6243)

## Darker monochromatic colors
- [Sherwin Williams After the Storm](https://plan-home.com/color/after-the-storm-sw-9685)
- [Sherwin Williams Charcoal Blue](https://plan-home.com/color/charcoal-blue-sw-2739)
- [Sherwin Williams Cyberspace](https://plan-home.com/color/cyberspace-sw-7076)

## Complementary colors
- [Sherwin Williams Truly Taupe](https://plan-home.com/color/truly-taupe-sw-6038)
- [Sherwin Williams Heavenly White](https://plan-home.com/color/heavenly-white-sw-6553)
- [Sherwin Williams Original White](https://plan-home.com/color/original-white-sw-7077)
- [Sherwin Williams Palisade](https://plan-home.com/color/palisade-sw-7635)
- [Sherwin Williams Griffin](https://plan-home.com/color/griffin-sw-7026)
- [Sherwin Williams Warm Stone](https://plan-home.com/color/warm-stone-sw-7032)
- [Sherwin Williams Mercurial](https://plan-home.com/color/mercurial-sw-9550)

Official product page: https://www.sherwin-williams.com/en-us/color/color-family/neutral-paint-colors/SW9640-sea-mariner

## Important note

Digital color values and matches are approximate. Screens, lighting, paint finish, surface texture, and application method can change how a color appears. Test a physical paint sample before making a final decision.