GREYS

Quaking Bog

#666A63

RGB 102, 106, 99 · HSL 94°, 3%, 40% · CMYK 4, 0, 7, 58

Quaking Bog is #666A63 in HEX — rgb(102, 106, 99), hsl(94°, 3%, 40%), cmyk(4%, 0%, 7%, 58%).

Quaking Bog pulls into the rich end of the greys spectrum — HSL 94°, 3%, 40%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on walls, soft furniture, hard surfaces — as the project's quiet backbone. Reads best alongside white trim, natural wood, brass, soft black accents.

Color Codes

HEX#666A63

RGB102, 106, 99

HSL94°, 3%, 40%

HSV94°, 7%, 42%

CMYK4, 0, 7, 58

Decimal6711907

CSS RGBrgb(102, 106, 99)

CSS HSLhsl(94, 3%, 40%)

Paint Matches — this color across 16 brands

Valspar

Quaking Bog 5005-2C

Exact match

Dulux

Bottle Green SG5E6

ΔE 1 · #656B65

RAL

Mouse Grey 7005

ΔE 1.4 · #646B63

PPG

Armory 1009-6

ΔE 1.6 · #6A6B65

Behr

Naturalism MQ6-19

ΔE 1.7 · #696A61

Benjamin Moore

Quarry 1568

ΔE 2 · #626A65

Vista Paint

Billowing Smoke C-582

ΔE 2.1 · #6B6F67

Sherwin-Williams

Night Owl SW7061

ΔE 2.1 · #63655F

Dunn-Edwards

Velvet Clover DE6293

ΔE 2.6 · #656D63

Hallman-Lindsay

Tornado Wind 584

ΔE 3.2 · #60635F

Kilz

Old Key RL260

ΔE 3.3 · #696D6B

Farrow & Ball

Down Pipe 26

ΔE 3.3 · #626664

Dutch Boy

Ashton Grey VS-9303

ΔE 3.7 · #66665A

IKEA

IKEA188 188

ΔE 3.9 · #646462

Colorhouse

Metal .05 Metal-05

ΔE 8.6 · #535654

Kobra

Green 37

ΔE 10.6 · #515545

Light Reflectance & Undertone

Light Reflectance Value (LRV)

14/100

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

TemperatureNeutral MasstoneYellow-Green UndertoneYellow

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

Color Theory

Complementary

#666A63

#666369

Analogous

#696963

#666A63

#636963

Triadic

#666A63

#636669

#696366

Split-Complementary

#666A63

#636369

#696369

Tetradic

#666A63

#636969

#666369

#696363

Monochromatic

#191A19

#3F423E

#666A63

#8C9089

#B2B5B0

Rectangle

#666A63

#636966

#666369

#696366

Compound

#666A63

#636963

#666369

#696369

Variations

Lighter

#848881

#A3A6A1

#C9CBC8

Darker

#51544F

#383A36

#202220

Saturation

#666765

#666963

#5F9B31

Interior Use

Best Rooms

living rooms, bedrooms, bathrooms

Best Uses

walls, soft furniture, hard surfaces

Pairs With

white trim, natural wood, brass, soft black accents

Accessibility (WCAG)

vs White

5.52:1

vs Black

3.81:1

AA Large

Deuteranopia

#666A63

#696864

Original → Simulated

Protanopia

#666A63

#696964

Original → Simulated

Tritanopia

#666A63

#676969

Original → Simulated

Color Psychology

Quiet · Versatile

Quaking Bog 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

#8C7C65

Warm Bulb 2700K

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

#666A63

Daylight 5500K

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

#79818A

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.

#5A416C

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: #666A63;

CSS — background

background-color: #666A63;

CSS Variable

--color-quaking-bog: #666A63;

Tailwind v3 — config

colors: { 'quaking-bog': '#666A63' }

Tailwind — arbitrary

bg-[#666A63] text-[#666A63]

SCSS

$quaking-bog: #666A63;

Similar Colors

Quarry Rock

#616964 · ΔE 2.1

Rainy Afternoon

#646B61 · ΔE 2.2

Kitty Gray

#646B68 · ΔE 2.7

Millstone Gray

#6A716A · ΔE 2.8

Kendall Charcoal

#676662 · ΔE 3.0

Burnt Ember

#6A6967 · ΔE 3.7

Windy City

#726E67 · ΔE 4.1

Overcoat

#696867 · ΔE 4.2

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 #666A63?

#666A63 is Quaking Bog, a mid-tone grey with a cool undertone.

Is #666A63 warm or cool?

Quaking Bog reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Quaking Bog?

Quaking Bog works well in living rooms, bedrooms, bathrooms. Designers typically use it for walls, soft furniture, hard surfaces.

What colors pair well with Quaking Bog?

Quaking Bog pairs naturally with white trim, natural wood, brass, soft black accents. Its complementary color is also a strong contrast option for accents.

Where can I download Quaking Bog?

You can download Quaking Bog 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 Quaking Bog?

The hex code is #666A63. In RGB it's 102, 106, 99, and in HSL it's 94°, 3%, 40%.

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