NEUTRALS

Dark Seagreen

#666655

RGB 102, 102, 85 · HSL 60°, 9%, 37% · CMYK 0, 0, 17, 60

Dark Seagreen is #666655 in HEX — rgb(102, 102, 85), hsl(60°, 9%, 37%), cmyk(0%, 0%, 17%, 60%).

Dark Seagreen pulls into the rich end of the neutrals spectrum — HSL 60°, 9%, 37%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on main walls, trims, ceilings — versatile across nearly any style. Reads best alongside soft whites, natural wood, matte black trim, linen.

Color Codes

HEX#666655

RGB102, 102, 85

HSL60°, 9%, 37%

HSV60°, 17%, 40%

CMYK0, 0, 17, 60

Decimal6710869

CSS RGBrgb(102, 102, 85)

CSS HSLhsl(60, 9%, 37%)

Paint Matches — this color across 16 brands

Dulux

Strong Olive S19B7

ΔE 0.9 · #656756

PPG

Double Duty 1030-7

ΔE 1 · #686858

Dunn-Edwards

Green Gate DE6273

ΔE 1.4 · #676957

Benjamin Moore

Castle 1561

ΔE 1.5 · #6A6858

Vista Paint

Eye of the Storm C-422

ΔE 1.5 · #686859

Sherwin-Williams

Eclipse SW6166

ΔE 2 · #6B6757

Hallman-Lindsay

Eye Of The Storm 423

ΔE 2.2 · #6B6A5B

IKEA

IKEA148 148

ΔE 2.4 · #676450

Behr

Fig Tree MQ6-58

ΔE 2.8 · #61604D

Dutch Boy

Ashton Grey VS-9303

ΔE 3 · #66665A

RAL

Concrete Grey 7023

ΔE 3.3 · #686C5E

Valspar

City Arboretum 6006-4C

ΔE 3.3 · #6D6954

Kilz

Yew Hedge LG100-02

ΔE 4 · #656952

Colorhouse

Stone .06 Stone-06

ΔE 4.7 · #746D5A

Farrow & Ball

Salon Drab 290

ΔE 6.3 · #726454

Kobra

Green 37

ΔE 7.6 · #515545

Light Reflectance & Undertone

Light Reflectance Value (LRV)

13/100

Dark

0 · DarkLight · 100

Soaks up light and feels moody and intimate. Great for studies, dining rooms and accent walls; pair with ample lighting.

Undertone

TemperatureWarm MasstoneYellow UndertoneGreen

A near-neutral with a subtle warm green undertone — it will pick up colour from surrounding surfaces and shift noticeably under different light.

Color Theory

Complementary

#666655

#565667

Analogous

#675E56

#666655

#5E6756

Triadic

#666655

#566767

#675667

Split-Complementary

#666655

#565E67

#5E5667

Tetradic

#666655

#56675E

#565667

#67565E

Monochromatic

#131310

#3D3D33

#666655

#90907A

#B2B2A3

Rectangle

#666655

#566756

#565667

#675667

Compound

#666655

#5E6756

#565667

#5E5667

Variations

Lighter

#8A8A73

#A6A697

#CACAC3

Darker

#535344

#39392F

#21211B

Saturation

#61615C

#676756

#92922B

Interior Use

Best Rooms

living rooms, bedrooms, kitchens

Best Uses

main walls, trim, accents

Pairs With

soft whites, natural wood, brass, matte black trim

Accessibility (WCAG)

vs White

5.84:1

vs Black

3.60:1

AA Large

Deuteranopia

#666655

#686556

Original → Simulated

Protanopia

#666655

#666657

Original → Simulated

Tritanopia

#666655

#676465

Original → Simulated

Color Psychology

Quiet · Versatile

Dark Seagreen gets out of the way so the architecture and the people in the room do the work. The right neutral is never a default — it reads warm or cool, dusty or sharp depending on its undertone, and that undertone is what makes or breaks the room.

SymbolismBalance, sophistication, calm

PersonalityAdaptable, considered, timeless

versatileneutraltimelessbackdroptrimwall

How it looks under different light

#8C795B

Warm Bulb 2700K

Incandescent / soft white LED — pulls colour toward yellow/amber.

#666655

Daylight 5500K

Midday natural light or daylight-spec LED — closest to the paint chip.

#797E7F

Cool Bulb 6500K

Cool white LED / overcast daylight — pulls colour toward blue.

Pairs With

#EBEBEA

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F7F7

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#3C3C64

Accent

Complementary punch

Hue +180°, slightly muted for paint vs. screen — use on a door, frame, or single piece.

#574738

Floor

Walnut neutral

Warm mid-brown grounds the scheme regardless of hero hue.

Paint Info

Brand · Product Line

Benjamin Moore / Regal Select Interior

Recommended Finishes

Eggshell (walls) · Pearl (trim) · Matte (ceiling)

Eggshell hides imperfections on main walls while keeping the color rich; pearl on trim adds subtle sheen and easier cleaning; flat matte on ceilings prevents glare.

Best Surfaces

Primary walls · Cabinetry · Doors · Mouldings

Coverage & Dry Time

Typical coverage 350-400 sq ft per gallon over a primed surface.

Touch-dry in ~1 hour. Recoat after 4 hours. Full cure 7-14 days.

Primer

Standard primer is adequate.

Application Tip

Use a 9" microfiber roller on walls and a 2.5" angled sash brush for trim cuts. Two coats minimum for even depth.

Paint Calculator

Wall area (m²)

Coats

Coverage (m² / L)

You'll need

4.0 litres

1.06 US gallons · room for one touch-up coat. Buy slightly more to ensure single-batch match.

Code Snippets

CSS — color

color: #666655;

CSS — background

background-color: #666655;

CSS Variable

--color-dark-seagreen: #666655;

Tailwind v3 — config

colors: { 'dark-seagreen': '#666655' }

Tailwind — arbitrary

bg-[#666655] text-[#666655]

SCSS

$dark-seagreen: #666655;

Similar Colors

Castle Peak Gray

#696757 · ΔE 1.2

Army Green

#6A6855 · ΔE 1.7

Forest Floor

#626451 · ΔE 1.8

Provincial Park

#696753 · ΔE 2.1

Dark Olive

#616253 · ΔE 2.1

Country Life

#6E6958 · ΔE 2.7

Jade Romanesque

#61644F · ΔE 3.0

Sharkskin

#6D6C5E · ΔE 3.2

Built by DSGN.HOUSE Updated 2026

Our color tools run on our own catalogue of 26,000+ real paint colors across 16 brands — Benjamin Moore, Sherwin-Williams, Behr, Dulux, RAL and more — with the color math (HSL and CIELAB matching) computed in-house, not scraped from summaries. Every color you pick maps to a real, buyable paint with its code, so what you see here you can actually take to the store. We review and update these tools and their data regularly.

Created by Denis Kataev, founder of DSGN.HOUSE — a software engineer and digital entrepreneur building professional color-design tools for everyone.

Frequently Asked Questions

What color is #666655?

#666655 is Dark Seagreen, a deep neutral with a cool undertone.

Is #666655 warm or cool?

Dark Seagreen reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Dark Seagreen?

Dark Seagreen works well in living rooms, bedrooms, kitchens. Designers typically use it for main walls, trim, accents.

What colors pair well with Dark Seagreen?

Dark Seagreen pairs naturally with soft whites, natural wood, brass, matte black trim. Its complementary color is also a strong contrast option for accents.

Where can I download Dark Seagreen?

You can download Dark Seagreen on DSGN.HOUSE in 15 designer formats including CSS gradient, Figma, Procreate swatches, Tailwind config, Adobe ASE, SVG, and 4K wallpapers — all free.

What's the hex code for Dark Seagreen?

The hex code is #666655. In RGB it's 102, 102, 85, and in HSL it's 60°, 9%, 37%.

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