NEUTRALS

Onyx Heart

#353839

RGB 53, 56, 57 · HSL 195°, 4%, 22% · CMYK 7, 2, 0, 78

Onyx Heart is #353839 in HEX — rgb(53, 56, 57), hsl(195°, 4%, 22%), cmyk(7%, 2%, 0%, 78%).

Onyx Heart pulls into the deep end of the neutrals spectrum — HSL 195°, 4%, 22%. 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#353839

RGB53, 56, 57

HSL195°, 4%, 22%

HSV195°, 7%, 22%

CMYK7, 2, 0, 78

Decimal3487801

CSS RGBrgb(53, 56, 57)

CSS HSLhsl(195, 4%, 22%)

Paint Matches — this color across 16 brands

Benjamin Moore

Mopboard CW-680

ΔE 1.1 · #38393A

Sherwin-Williams

Greenblack SW6994

ΔE 1.1 · #373A3A

Hallman-Lindsay

Sayward Pine historic-sayward-pine

ΔE 1.4 · #383839

Colorhouse

Nourish .06 Nourish-06

ΔE 1.5 · #313536

Vista Paint

Black Licorice C-528

ΔE 1.5 · #373938

Kilz

Mystic Black TB-39

ΔE 1.7 · #383938

Kobra

Black 44

ΔE 1.9 · #383737

Dulux

Black Caviar SN4H9

ΔE 2 · #3A393A

Dunn-Edwards

Black DEA187

ΔE 2.3 · #3B3A3A

Behr

Limousine Leather MQ5-5

ΔE 2.5 · #3C3C3D

Farrow & Ball

Pitch Black 256

ΔE 2.8 · #3B3938

RAL

Black Green 6012

ΔE 3.7 · #343E40

Valspar

Dark Kettle Black 4011-2

ΔE 4.1 · #3F4043

IKEA

IKEA186 186

ΔE 4.2 · #302F2F

PPG

Black Magic 1001-7

ΔE 4.4 · #414040

Dutch Boy

Dark Chocolate D-6782

ΔE 10.5 · #392A27

Light Reflectance & Undertone

Light Reflectance Value (LRV)

4/100

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 MasstoneBlue UndertoneViolet

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

Color Theory

Complementary

#353839

#3A3736

Analogous

#363A39

#353839

#36373A

Triadic

#353839

#3A3639

#393A36

Split-Complementary

#353839

#3A3637

#3A3936

Tetradic

#353839

#39363A

#3A3736

#373A36

Monochromatic

#0C0D0D

#111213

#353839

#5B6062

#808789

Rectangle

#353839

#37363A

#3A3736

#393A36

Compound

#353839

#36373A

#3A3736

#3A3936

Variations

Lighter

#5C6264

#848A8C

#B7BABB

Darker

#2B2E2F

#1D2020

#111213

Saturation

#373839

#36393A

#1B4755

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

11.82:1

AAA

vs Black

1.78:1

Fail

Deuteranopia

#353839

#373739

Original → Simulated

Protanopia

#353839

#383839

Original → Simulated

Tritanopia

#353839

#353838

Original → Simulated

Color Psychology

Quiet · Versatile

Onyx Heart 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

#675746

Warm Bulb 2700K

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

#353839

Daylight 5500K

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

#545C6A

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.

#3C2A24

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: #353839;

CSS — background

background-color: #353839;

CSS Variable

--color-onyx-heart: #353839;

Tailwind v3 — config

colors: { 'onyx-heart': '#353839' }

Tailwind — arbitrary

bg-[#353839] text-[#353839]

SCSS

$onyx-heart: #353839;

Similar Colors

Mopboard Black

#373839 · ΔE 0.9

Black Tar

#38393A · ΔE 1.1

Ebony King

#383A3C · ΔE 1.3

Black Ink

#373A3D · ΔE 1.6

Black Knight

#303536 · ΔE 1.8

Black Satin

#313435 · ΔE 1.8

Midnight Dream

#323436 · ΔE 1.9

Twilight Zone

#343435 · ΔE 2.0

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 #353839?

#353839 is Onyx Heart, a deep neutral with a cool undertone.

Is #353839 warm or cool?

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

What rooms work best with Onyx Heart?

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

What colors pair well with Onyx Heart?

Onyx Heart 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 Onyx Heart?

You can download Onyx Heart 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 Onyx Heart?

The hex code is #353839. In RGB it's 53, 56, 57, and in HSL it's 195°, 4%, 22%.

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