BLUES

Astrogranite Debris

#3B424C

RGB 59, 66, 76 · HSL 215°, 13%, 26% · CMYK 22, 13, 0, 70

Astrogranite Debris is #3B424C in HEX — rgb(59, 66, 76), hsl(215°, 13%, 26%), cmyk(22%, 13%, 0%, 70%).

Astrogranite Debris pulls into the deep end of the blues spectrum — HSL 215°, 13%, 26%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on bedrooms, bathrooms, home offices — for calm, focused environments. Reads best alongside warm white trim, oak or walnut, brass or matte black hardware.

Color Codes

HEX#3B424C

RGB59, 66, 76

HSL215°, 13%, 26%

HSV215°, 22%, 30%

CMYK22, 13, 0, 70

Decimal3883596

CSS RGBrgb(59, 66, 76)

CSS HSLhsl(215, 13%, 26%)

Paint Matches — this color across 16 brands

Sherwin-Williams

Charcoal Blue SW2739

ΔE 1.6 · #3D4450

Dulux

Deep Storm S40A8

ΔE 1.9 · #3F4651

Valspar

Blue Coal 4011-3

ΔE 2.5 · #414450

PPG

Wright Midnight FLLW36

ΔE 2.7 · #404149

RAL

Slate Grey 7015

ΔE 2.8 · #434750

Behr

Night Club N500-7

ΔE 2.9 · #334049

Vista Paint

Pantry Plum K-88

ΔE 3 · #3D3F4C

Dunn-Edwards

Parisian Night DEA184

ΔE 3.2 · #3F4855

Benjamin Moore

Abyss 2128-20

ΔE 3.2 · #43454C

Kilz

Night Magic RM230

ΔE 3.3 · #3C4348

Hallman-Lindsay

Octavius 522

ΔE 5 · #38393F

Farrow & Ball

Railings 31

ΔE 5.5 · #45484B

Colorhouse

Metal .06 Metal-06

ΔE 6.1 · #3F4647

IKEA

IKEA163 163

ΔE 6.8 · #423A45

Kobra

Black 44

ΔE 8.5 · #383737

Dutch Boy

Seal of Grey VS-9301

ΔE 11.6 · #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

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

#3B424C

#4B443A

Analogous

#3A494B

#3B424C

#3B3A4B

Triadic

#3B424C

#4B3A41

#414B3A

Split-Complementary

#3B424C

#4B3B3A

#494B3A

Tetradic

#3B424C

#4B3A49

#4B443A

#3A4B3B

Monochromatic

#0B0C0E

#181B20

#3B424C

#5B6676

#808C9D

Rectangle

#3B424C

#443A4B

#4B443A

#414B3A

Compound

#3B424C

#3B3A4B

#4B443A

#494B3A

Variations

Lighter

#5B6676

#818C9A

#B7BCC3

Darker

#2E343C

#1F242A

#121518

Saturation

#404245

#3A414B

#1D3C68

Interior Use

Best Rooms

bedrooms, bathrooms, home offices

Best Uses

main walls, ceilings, trim, cabinetry

Pairs With

warm white trim, oak or walnut, brass or matte black hardware

Accessibility (WCAG)

vs White

10.15:1

AAA

vs Black

2.07:1

Fail

Deuteranopia

#3B424C

#3D414C

Original → Simulated

Protanopia

#3B424C

#41414B

Original → Simulated

Tritanopia

#3B424C

#3A4442

Original → Simulated

Color Psychology

Focused · Cooling

Astrogranite Debris lowers the temperature of a room — useful in south-facing rooms that overheat visually, and in home offices where you want a clear head. Pair with warm wood and brass to keep it from reading clinical.

SymbolismTrust, depth, stability

PersonalityClear-headed, dependable, contemplative

focustrustcalmofficebedroomdepth

How it looks under different light

#6C5E54

Warm Bulb 2700K

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

#3B424C

Daylight 5500K

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

#596378

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.

#463B2A

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: #3B424C;

CSS — background

background-color: #3B424C;

CSS Variable

--color-astrogranite-debris: #3B424C;

Tailwind v3 — config

colors: { 'astrogranite-debris': '#3B424C' }

Tailwind — arbitrary

bg-[#3B424C] text-[#3B424C]

SCSS

$astrogranite-debris: #3B424C;

Similar Colors

Abyss

#42444B · ΔE 3.0

Polo Blue

#323A43 · ΔE 3.7

Hale Navy

#434B56 · ΔE 3.9

Blackberry Punch

#3F4150 · ΔE 4.0

Blue Note

#404B54 · ΔE 4.0

Mysterious

#454B54 · ΔE 4.1

Soot

#373C41 · ΔE 4.2

Evening Sky

#464956 · ΔE 4.3

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 #3B424C?

#3B424C is Astrogranite Debris, a deep blue with a cool undertone.

Is #3B424C warm or cool?

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

What rooms work best with Astrogranite Debris?

Astrogranite Debris works well in bedrooms, bathrooms, home offices. Designers typically use it for main walls, ceilings, trim, cabinetry.

What colors pair well with Astrogranite Debris?

Astrogranite Debris pairs naturally with warm white trim, oak or walnut, brass or matte black hardware. Its complementary color is also a strong contrast option for accents.

Where can I download Astrogranite Debris?

You can download Astrogranite Debris 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 Astrogranite Debris?

The hex code is #3B424C. In RGB it's 59, 66, 76, and in HSL it's 215°, 13%, 26%.

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