NEUTRALS

Arsenic

#3B444B

RGB 59, 68, 75 · HSL 206°, 12%, 26% · CMYK 21, 9, 0, 71

Arsenic is #3B444B in HEX — rgb(59, 68, 75), hsl(206°, 12%, 26%), cmyk(21%, 9%, 0%, 71%).

Arsenic pulls into the deep end of the neutrals spectrum — HSL 206°, 12%, 26%. 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#3B444B

RGB59, 68, 75

HSL206°, 12%, 26%

HSV206°, 21%, 29%

CMYK21, 9, 0, 71

Decimal3884107

CSS RGBrgb(59, 68, 75)

CSS HSLhsl(206, 12%, 26%)

Paint Matches — this color across 16 brands

Kilz

Night Magic RM230

ΔE 1.5 · #3C4348

PPG

Midnight Hour 1038-7

ΔE 2.1 · #3B484F

Dulux

Rimaldo SG5C8

ΔE 2.4 · #394750

Sherwin-Williams

Mount Etna SW7625

ΔE 2.6 · #3D484C

Behr

Night Club N500-7

ΔE 2.8 · #334049

Dunn-Edwards

Stargazing DE6336

ΔE 2.8 · #414549

RAL

Slate Grey 7015

ΔE 3.1 · #434750

Benjamin Moore

Abyss 2128-20

ΔE 3.1 · #43454C

Valspar

Very Black 5011-2

ΔE 3.1 · #424449

Vista Paint

Puerto Deseado K-160

ΔE 3.8 · #303D44

Hallman-Lindsay

Dark River 494

ΔE 4 · #3E4445

Colorhouse

Metal .06 Metal-06

ΔE 4 · #3F4647

Farrow & Ball

Railings 31

ΔE 4.1 · #45484B

IKEA

IKEA152 152

ΔE 6.3 · #494F50

Kobra

Black 44

ΔE 7.9 · #383737

Dutch Boy

Seal of Grey VS-9301

ΔE 10.4 · #575757

Light Reflectance & Undertone

Light Reflectance Value (LRV)

6/100

Very Dark

0 · DarkLight · 100

Absorbs almost all light — dramatic and cocooning. Needs strong artificial lighting and works best as an accent or in well-lit rooms.

Undertone

TemperatureCool MasstoneBlue UndertoneViolet

Reads as a cool blue with a violet undertone showing through, especially in daylight. Pair trim and adjacent colours to either calm or amplify that undertone.

Color Theory

Complementary

#3B444B

#4A413A

Analogous

#3A4A49

#3B444B

#3A3B4A

Triadic

#3B444B

#4A3A43

#434A3A

Split-Complementary

#3B444B

#4A3A3B

#4A493A

Tetradic

#3B444B

#493A4A

#4A413A

#3B4A3A

Monochromatic

#0B0D0E

#191C1F

#3B444B

#5C6A75

#81919C

Rectangle

#3B444B

#413A4A

#4A413A

#434A3A

Compound

#3B444B

#3A3B4A

#4A413A

#4A493A

Variations

Lighter

#5C6A75

#828F99

#B7BEC3

Darker

#2E363C

#202529

#121618

Saturation

#404345

#3A434A

#1D4767

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

9.93:1

AAA

vs Black

2.11:1

Fail

Deuteranopia

#3B444B

#3F424B

Original → Simulated

Protanopia

#3B444B

#43434A

Original → Simulated

Tritanopia

#3B444B

#3B4544

Original → Simulated

Color Psychology

Quiet · Versatile

Arsenic 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

#6C6053

Warm Bulb 2700K

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

#3B444B

Daylight 5500K

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

#596578

Cool Bulb 6500K

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

Pairs With

#EAEBEB

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.

#46362A

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: #3B444B;

CSS — background

background-color: #3B444B;

CSS Variable

--color-arsenic: #3B444B;

Tailwind v3 — config

colors: { 'arsenic': '#3B444B' }

Tailwind — arbitrary

bg-[#3B444B] text-[#3B444B]

SCSS

$arsenic: #3B444B;

Similar Colors

Abyss

#42444B · ΔE 2.9

Gravel Gray

#444A50 · ΔE 3.1

Black Horizon

#44484D · ΔE 3.2

Blue Note

#404B54 · ΔE 3.3

Witching Hour

#46494F · ΔE 3.7

Baby Seal Black

#464A50 · ΔE 3.7

Mysterious

#454B54 · ΔE 3.8

Soot

#373C41 · ΔE 3.8

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 #3B444B?

#3B444B is Arsenic, a deep neutral with a cool undertone.

Is #3B444B warm or cool?

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

What rooms work best with Arsenic?

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

What colors pair well with Arsenic?

Arsenic 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 Arsenic?

You can download Arsenic 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 Arsenic?

The hex code is #3B444B. In RGB it's 59, 68, 75, and in HSL it's 206°, 12%, 26%.

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