NEUTRALS

Deep Well

#33313B

RGB 51, 49, 59 · HSL 252°, 9%, 21% · CMYK 14, 17, 0, 77

Deep Well is #33313B in HEX — rgb(51, 49, 59), hsl(252°, 9%, 21%), cmyk(14%, 17%, 0%, 77%).

Deep Well pulls into the deep end of the neutrals spectrum — HSL 252°, 9%, 21%. 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#33313B

RGB51, 49, 59

HSL252°, 9%, 21%

HSV252°, 17%, 23%

CMYK14, 17, 0, 77

Decimal3354939

CSS RGBrgb(51, 49, 59)

CSS HSLhsl(252, 9%, 21%)

Paint Matches — this color across 16 brands

Dulux

Witches Cauldron S43A9

ΔE 1.5 · #36343F

Behr

Black Garnet N110-7

ΔE 3 · #38363D

Sherwin-Williams

Black Swan SW6279

ΔE 3.5 · #3A373E

Benjamin Moore

Tulsa 2070-10

ΔE 4.3 · #3C343A

Vista Paint

In the Dark K-776

ΔE 4.4 · #36373C

Hallman-Lindsay

Octavius 522

ΔE 4.5 · #38393F

RAL

Granite Grey 7026

ΔE 4.6 · #2F353B

Valspar

Twilight Purple 4010-2

ΔE 4.7 · #3E3B46

IKEA

IKEA163 163

ΔE 5.4 · #423A45

Colorhouse

Nourish .06 Nourish-06

ΔE 6.8 · #313536

PPG

Napoleon 1013-7

ΔE 7.1 · #404149

Kobra

Black 44

ΔE 7.2 · #383737

Dunn-Edwards

Black DEA187

ΔE 7.7 · #3B3A3A

Kilz

Spice Brown TB-30

ΔE 8 · #372F2E

Farrow & Ball

Pitch Black 256

ΔE 8.1 · #3B3938

Dutch Boy

Dark Chocolate D-6782

ΔE 11.3 · #392A27

Light Reflectance & Undertone

Light Reflectance Value (LRV)

3/100

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

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

Color Theory

Complementary

#33313B

#383A31

Analogous

#31343A

#33313B

#37313A

Triadic

#33313B

#3A3331

#313A33

Split-Complementary

#33313B

#3A3731

#343A31

Tetradic

#33313B

#3A3134

#383A31

#313A37

Monochromatic

#0C0C0E

#0E0E11

#33313B

#575464

#7B778D

Rectangle

#33313B

#3A3138

#383A31

#313A33

Compound

#33313B

#37313A

#383A31

#343A31

Variations

Lighter

#595566

#817D8F

#B6B4BD

Darker

#28272F

#1C1B20

#100F13

Saturation

#353437

#33313A

#241853

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

12.78:1

AAA

vs Black

1.64:1

Fail

Deuteranopia

#33313B

#30333B

Original → Simulated

Protanopia

#33313B

#31313A

Original → Simulated

Tritanopia

#33313B

#323332

Original → Simulated

Color Psychology

Quiet · Versatile

Deep Well 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

#665147

Warm Bulb 2700K

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

#33313B

Daylight 5500K

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

#53566C

Cool Bulb 6500K

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

Pairs With

#EAEAEB

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.

#353922

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: #33313B;

CSS — background

background-color: #33313B;

CSS Variable

--color-deep-well: #33313B;

Tailwind v3 — config

colors: { 'deep-well': '#33313B' }

Tailwind — arbitrary

bg-[#33313B] text-[#33313B]

SCSS

$deep-well: #33313B;

Similar Colors

Deep Mulberry

#3C3845 · ΔE 4.0

Tulsa Twilight

#3B3339 · ΔE 4.1

After Midnight

#33383E · ΔE 4.8

Polo Blue

#323A43 · ΔE 5.4

Dark Basalt

#40363C · ΔE 5.4

Toucan Black

#3C3B40 · ΔE 5.5

Carbon Copy

#383537 · ΔE 5.7

Midnight Dream

#323436 · ΔE 5.8

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 #33313B?

#33313B is Deep Well, a deep neutral with a cool undertone.

Is #33313B warm or cool?

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

What rooms work best with Deep Well?

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

What colors pair well with Deep Well?

Deep Well 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 Deep Well?

You can download Deep Well 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 Deep Well?

The hex code is #33313B. In RGB it's 51, 49, 59, and in HSL it's 252°, 9%, 21%.

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