NEUTRALS

Dark River

#3A3F3F

RGB 58, 63, 63 · HSL 180°, 4%, 24% · CMYK 8, 0, 0, 75

Dark River is #3A3F3F in HEX — rgb(58, 63, 63), hsl(180°, 4%, 24%), cmyk(8%, 0%, 0%, 75%).

Dark River pulls into the deep end of the neutrals spectrum — HSL 180°, 4%, 24%. 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#3A3F3F

RGB58, 63, 63

HSL180°, 4%, 24%

HSV180°, 8%, 25%

CMYK8, 0, 0, 75

Decimal3817279

CSS RGBrgb(58, 63, 63)

CSS HSLhsl(180, 4%, 24%)

Paint Matches — this color across 16 brands

Vista Paint

Dark River C-493

Exact match

Benjamin Moore

Blacktop 2135-10

ΔE 0.9 · #3A3E3D

Dulux

Rawene NZ10G3

ΔE 1.5 · #3C3E3F

Behr

Madison Avenue QE-64

ΔE 1.8 · #3C3D3D

Kilz

True Black RM260A

ΔE 2.2 · #3D3D3D

Sherwin-Williams

Greenblack SW6994

ΔE 2.2 · #373A3A

Dunn-Edwards

Dark Engine DE6350

ΔE 2.3 · #3E3F41

Hallman-Lindsay

Black Licorice 529

ΔE 2.3 · #3A3B3B

RAL

Black Green 6012

ΔE 2.6 · #343E40

PPG

Black Magic 1001-7

ΔE 2.8 · #414040

Valspar

Dark Kettle Black 4011-2

ΔE 2.8 · #3F4043

Colorhouse

Metal .06 Metal-06

ΔE 3.1 · #3F4647

Farrow & Ball

Off-Black 57

ΔE 3.6 · #444546

Kobra

Black 44

ΔE 4 · #383737

IKEA

IKEA152 152

ΔE 6.9 · #494F50

Dutch Boy

Seal of Grey VS-9301

ΔE 11 · #575757

Light Reflectance & Undertone

Light Reflectance Value (LRV)

5/100

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

TemperatureNeutral MasstoneTeal UndertoneGreen

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

Color Theory

Complementary

#3A3F3F

#403B3B

Analogous

#3B403D

#3A3F3F

#3B3D40

Triadic

#3A3F3F

#403B40

#40403B

Split-Complementary

#3A3F3F

#403B3D

#403D3B

Tetradic

#3A3F3F

#3D3B40

#403B3B

#3D403B

Monochromatic

#0C0D0D

#161818

#3A3F3F

#5F6767

#858E8E

Rectangle

#3A3F3F

#3B3B40

#403B3B

#40403B

Compound

#3A3F3F

#3B3D40

#403B3B

#403D3B

Variations

Lighter

#606868

#878F8F

#B9BDBD

Darker

#2F3333

#202323

#131414

Saturation

#3C3E3E

#3B4040

#1D5D5D

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

10.70:1

AAA

vs Black

1.96:1

Fail

Deuteranopia

#3A3F3F

#3D3D3F

Original → Simulated

Protanopia

#3A3F3F

#3E3E3F

Original → Simulated

Tritanopia

#3A3F3F

Original → Simulated

Color Psychology

Quiet · Versatile

Dark River 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

#6B5C4A

Warm Bulb 2700K

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

#3A3F3F

Daylight 5500K

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

#58616F

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.

#412727

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 / Aura Interior (for richer color depth in deep tones)

Recommended Finishes

Matte (walls) · Pearl (trim) · Satin (doors)

Deep colors look best in matte — gloss exaggerates surface flaws. Reserve subtle sheen for trim, doors, and high-touch areas.

Best Surfaces

Accent walls · Doors · Cabinetry · Built-ins

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

Tinted primer in a similar value is highly recommended — saves a coat and prevents the wall colour from washing the surface.

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: #3A3F3F;

CSS — background

background-color: #3A3F3F;

CSS Variable

--color-dark-river: #3A3F3F;

Tailwind v3 — config

colors: { 'dark-river': '#3A3F3F' }

Tailwind — arbitrary

bg-[#3A3F3F] text-[#3A3F3F]

SCSS

$dark-river: #3A3F3F;

Similar Colors

Blacktop

#393D3C · ΔE 1.1

Black Panther

#3D3F40 · ΔE 1.5

Midnight

#373D3F · ΔE 1.6

Notre Dame

#404343 · ΔE 2.1

Black Iron

#3A3C3E · ΔE 2.1

Black Jack

#3D3D3E · ΔE 2.3

Regent Green

#364042 · ΔE 2.4

Ebony King

#383A3C · ΔE 2.7

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 #3A3F3F?

#3A3F3F is Dark River, a deep neutral with a cool undertone.

Is #3A3F3F warm or cool?

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

What rooms work best with Dark River?

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

What colors pair well with Dark River?

Dark River 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 River?

You can download Dark River 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 River?

The hex code is #3A3F3F. In RGB it's 58, 63, 63, and in HSL it's 180°, 4%, 24%.

← All colors