GREENS

Antique Slate

#455C59

RGB 69, 92, 89 · HSL 172°, 14%, 32% · CMYK 25, 0, 3, 64

Antique Slate is #455C59 in HEX — rgb(69, 92, 89), hsl(172°, 14%, 32%), cmyk(25%, 0%, 3%, 64%).

Antique Slate pulls into the rich end of the greens spectrum — HSL 172°, 14%, 32%. 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#455C59

RGB69, 92, 89

HSL172°, 14%, 32%

HSV172°, 25%, 36%

CMYK25, 0, 3, 64

Decimal4545625

CSS RGBrgb(69, 92, 89)

CSS HSLhsl(172, 14%, 32%)

Paint Matches — this color across 16 brands

PPG

Antique Slate 13-29

Exact match

Dunn-Edwards

Loch Ness DE5748

ΔE 1.3 · #445956

Benjamin Moore

Mediterranean 2123-10

ΔE 1.6 · #475A57

Behr

Hostaleaf MQ6-9

ΔE 1.8 · #475B5A

Dulux

Concealment S27A8

ΔE 3.2 · #405851

Valspar

Peacock House 5010-4

ΔE 3.2 · #405550

Sherwin-Williams

Still Water SW6223

ΔE 3.7 · #4A5D5F

Vista Paint

Gedney Green C-1412

ΔE 3.9 · #43544F

Hallman-Lindsay

Gedney Green historic-gedney-green

ΔE 4 · #40534E

Kilz

Fathoms Below RE290-02

ΔE 5.1 · #3F5A5F

RAL

Basalt Grey 7012

ΔE 5.5 · #4E5754

Kobra

Green 38

ΔE 6.7 · #415448

Farrow & Ball

Inchyra Blue 289

ΔE 6.7 · #586768

Colorhouse

Metal .05 Metal-05

ΔE 8 · #535654

IKEA

IKEA152 152

ΔE 8.3 · #494F50

Dutch Boy

Seal of Grey VS-9301

ΔE 9.4 · #575757

Light Reflectance & Undertone

Light Reflectance Value (LRV)

10/100

Dark

0 · DarkLight · 100

Soaks up light and feels moody and intimate. Great for studies, dining rooms and accent walls; pair with ample lighting.

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

#455C59

#5D4649

Analogous

#465D4F

#455C59

#46555D

Triadic

#455C59

#5A465D

#5D5A46

Split-Complementary

#455C59

#5D4655

#5D4F46

Tetradic

#455C59

#4F465D

#5D4649

#555D46

Monochromatic

#0B0F0E

#253130

#455C59

#678984

#91ACA8

Rectangle

#455C59

#46495D

#5D4649

#5D5A46

Compound

#455C59

#46555D

#5D4649

#5D4F46

Variations

Lighter

#648580

#8BA3A0

#BCC8C7

Darker

#384B48

#263432

#161E1D

Saturation

#4E5554

#465D5A

#238074

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

7.17:1

AAA

vs Black

2.93:1

Fail

Deuteranopia

#455C59

#54555A

Original → Simulated

Protanopia

#455C59

#595959

Original → Simulated

Tritanopia

#455C59

#465B5B

Original → Simulated

Color Psychology

Calm · Restorative

Antique Slate 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

#73725E

Warm Bulb 2700K

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

#455C59

Daylight 5500K

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

#607782

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.

#573439

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: #455C59;

CSS — background

background-color: #455C59;

CSS Variable

--color-antique-slate: #455C59;

Tailwind v3 — config

colors: { 'antique-slate': '#455C59' }

Tailwind — arbitrary

bg-[#455C59] text-[#455C59]

SCSS

$antique-slate: #455C59;

Similar Colors

Mediterranean Teal

#465956 · ΔE 1.8

Tarrytown Green

#415752 · ΔE 2.5

Goodwin Green

#435851 · ΔE 3.1

Crisp Romaine

#445851 · ΔE 3.1

Hidden Falls

#415451 · ΔE 3.4

Yorktowne Green

#465A5D · ΔE 4.1

Olympus Green

#3D585B · ΔE 4.2

Dark Pewter

#4B5756 · ΔE 4.6

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 #455C59?

#455C59 is Antique Slate, a deep green with a cool undertone.

Is #455C59 warm or cool?

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

What rooms work best with Antique Slate?

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

What colors pair well with Antique Slate?

Antique Slate 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 Antique Slate?

You can download Antique Slate 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 Antique Slate?

The hex code is #455C59. In RGB it's 69, 92, 89, and in HSL it's 172°, 14%, 32%.

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