GREENS

Astronomical

#334142

RGB 51, 65, 66 · HSL 184°, 13%, 23% · CMYK 23, 2, 0, 74

Astronomical is #334142 in HEX — rgb(51, 65, 66), hsl(184°, 13%, 23%), cmyk(23%, 2%, 0%, 74%).

Astronomical pulls into the deep end of the greens spectrum — HSL 184°, 13%, 23%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on bedrooms, bathrooms, libraries — for grounding, restorative spaces. Reads best alongside soft white walls, oak floors, brass, warm clay accents.

Color Codes

HEX#334142

RGB51, 65, 66

HSL184°, 13%, 23%

HSV184°, 23%, 26%

CMYK23, 2, 0, 74

Decimal3359042

CSS RGBrgb(51, 65, 66)

CSS HSLhsl(184, 13%, 23%)

Paint Matches — this color across 16 brands

Behr

Astronomical N450-7

Exact match

Benjamin Moore

Salamander 2050-10

ΔE 1.3 · #303F3F

RAL

Black Green 6012

ΔE 2 · #343E40

Dunn-Edwards

Refined Green DEA181

ΔE 2.6 · #384543

Dulux

Mundi SG5D9

ΔE 2.8 · #2F4045

Vista Paint

Moonless Sky K-848

ΔE 3.3 · #3A4040

Sherwin-Williams

Rookwood Shutter Green SW2809

ΔE 3.4 · #303B39

PPG

Dark As Night 14-05

ΔE 3.5 · #3D4645

Hallman-Lindsay

Winter Balsam historic-winter-balsam

ΔE 3.7 · #314747

Colorhouse

Metal .06 Metal-06

ΔE 4 · #3F4647

Kilz

Night Magic RM230

ΔE 4.3 · #3C4348

Valspar

Nocturnal Green 5011-1

ΔE 4.8 · #414647

Farrow & Ball

Off-Black 57

ΔE 6.2 · #444546

Kobra

Black 44

ΔE 7.1 · #383737

IKEA

IKEA152 152

ΔE 7.5 · #494F50

Dutch Boy

Dark Green D-6751

ΔE 11.2 · #214136

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 MasstoneTeal UndertoneGreen

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

Color Theory

Complementary

#334142

#423433

Analogous

#33423C

#334142

#333A42

Triadic

#334142

#423341

#414233

Split-Complementary

#334142

#42333A

#423C33

Tetradic

#334142

#3C3342

#423433

#3A4233

Monochromatic

#0B0E0E

#121717

#334142

#546C6D

#789597

Rectangle

#334142

#343342

#423433

#414233

Compound

#334142

#333A42

#423433

#423C33

Variations

Lighter

#556D6F

#7C9496

#B4C0C1

Darker

#293435

#1C2425

#101516

Saturation

#383D3D

#334142

#1A575C

Interior Use

Best Rooms

bedrooms, bathrooms, libraries

Best Uses

main walls, cabinetry, soft furniture

Pairs With

soft white walls, oak floors, brass, warm clay accents

Accessibility (WCAG)

vs White

10.63:1

AAA

vs Black

1.98:1

Fail

Deuteranopia

#334142

#3B3D43

Original → Simulated

Protanopia

#334142

#3F3F42

Original → Simulated

Tritanopia

#334142

#334140

Original → Simulated

Color Psychology

Calm · Restorative

Astronomical sits in the part of the spectrum the eye relaxes into. Designers reach for green when a room needs to feel like a refuge — bedrooms, libraries, bathrooms — because it lowers visual blood-pressure without flattening the space.

SymbolismGrowth, balance, nature

PersonalitySteady, grounded, thoughtful

calmnaturerestorativebalancebedroomlibrary

How it looks under different light

#665D4D

Warm Bulb 2700K

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

#334142

Daylight 5500K

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

#536271

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.

#3E2725

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: #334142;

CSS — background

background-color: #334142;

CSS Variable

--color-astronomical: #334142;

Tailwind v3 — config

colors: { 'astronomical': '#334142' }

Tailwind — arbitrary

bg-[#334142] text-[#334142]

SCSS

$astronomical: #334142;

Similar Colors

Salamander

#2F3E3E · ΔE 1.7

Regent Green

#364042 · ΔE 1.8

Midnight

#373D3F · ΔE 3.6

Pacific Sea Teal

#274043 · ΔE 4.2

Miramichi

#30484A · ΔE 4.4

Blacktop

#393D3C · ΔE 4.4

Soot

#373C41 · ΔE 4.9

Notre Dame

#404343 · ΔE 4.9

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 #334142?

#334142 is Astronomical, a deep green with a cool undertone.

Is #334142 warm or cool?

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

What rooms work best with Astronomical?

Astronomical works well in bedrooms, bathrooms, libraries. Designers typically use it for main walls, cabinetry, soft furniture.

What colors pair well with Astronomical?

Astronomical pairs naturally with soft white walls, oak floors, brass, warm clay accents. Its complementary color is also a strong contrast option for accents.

Where can I download Astronomical?

You can download Astronomical 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 Astronomical?

The hex code is #334142. In RGB it's 51, 65, 66, and in HSL it's 184°, 13%, 23%.

← All colors