GREENS

Apatite Blue

#31827B

RGB 49, 130, 123 · HSL 175°, 45%, 35% · CMYK 62, 0, 5, 49

Apatite Blue is #31827B in HEX — rgb(49, 130, 123), hsl(175°, 45%, 35%), cmyk(62%, 0%, 5%, 49%).

Apatite Blue pulls into the rich end of the greens spectrum — HSL 175°, 45%, 35%. The balanced saturation makes it confident without overpowering, 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#31827B

RGB49, 130, 123

HSL175°, 45%, 35%

HSV175°, 62%, 51%

CMYK62, 0, 5, 49

Decimal3244667

CSS RGBrgb(49, 130, 123)

CSS HSLhsl(175, 45%, 35%)

Paint Matches — this color across 16 brands

Dulux

Nero's Green S29E7

ΔE 2.5 · #31817E

Valspar

Elegant Silk 5010-7

ΔE 3 · #378377

Vista Paint

Tropical Teal K-225

ΔE 4.1 · #3C8583

PPG

Carlisle 1141-6

ΔE 4.2 · #45867C

Hallman-Lindsay

Atmosphere 689

ΔE 4.4 · #3A8483

Dunn-Edwards

Royal Palm DE5726

ΔE 4.5 · #418D84

Sherwin-Williams

Thermal Spring SW6761

ΔE 4.7 · #3B8C80

Behr

Tealish S440-6

ΔE 4.9 · #3D7B71

Benjamin Moore

Highlands 650

ΔE 5.3 · #3C7F70

Kilz

Tropical Lagoon RF270-02

ΔE 5.6 · #1A7B7C

Colorhouse

Dream .05 Dream-05

ΔE 6.5 · #18887C

RAL

Mint Turquoise 6033

ΔE 6.8 · #497E76

Farrow & Ball

Vardo 288

ΔE 9.7 · #427E83

Kobra

Green 41

ΔE 10.2 · #009185

IKEA

IKEA118 118

ΔE 11.5 · #317983

Dutch Boy

Grass Green D-6753

ΔE 15.7 · #317455

Light Reflectance & Undertone

Light Reflectance Value (LRV)

18/100

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

#31827B

#813138

Analogous

#318153

#31827B

#316081

Triadic

#31827B

#7B3181

#817B31

Split-Complementary

#31827B

#813160

#815331

Tetradic

#31827B

#533181

#813138

#608131

Monochromatic

#071212

#1C4A46

#31827B

#46B9AF

#7ECEC7

Rectangle

#31827B

#313881

#813138

#817B31

Compound

#31827B

#316081

#813138

#815331

Variations

Lighter

#43B1A8

#76C2BB

#B3D7D4

Darker

#266964

#194945

#0E2B29

Saturation

#4D6563

#31817B

#199A8F

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

4.56:1

vs Black

4.61:1

Deuteranopia

#31827B

#6A6E7D

Original → Simulated

Protanopia

#31827B

#79797C

Original → Simulated

Tritanopia

#31827B

#37807E

Original → Simulated

Color Psychology

Calm · Restorative

Apatite Blue 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

#648E77

Warm Bulb 2700K

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

#31827B

Daylight 5500K

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

#51939C

Cool Bulb 6500K

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

Pairs With

#E9ECEC

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F8F8

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#692F34

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: #31827B;

CSS — background

background-color: #31827B;

CSS Variable

--color-apatite-blue: #31827B;

Tailwind v3 — config

colors: { 'apatite-blue': '#31827B' }

Tailwind — arbitrary

bg-[#31827B] text-[#31827B]

SCSS

$apatite-blue: #31827B;

Similar Colors

Highlands Green

#3B7E6F · ΔE 5.4

Geddy Verdigris

#2E8B7E · ΔE 5.6

Intercoastal Green

#2E7572 · ΔE 5.9

Green Gables

#34816F · ΔE 6.6

Tropical Teal

#00898A · ΔE 7.3

Aruba Blue

#008B84 · ΔE 7.3

Gulf Shores

#008C87 · ΔE 7.4

Tropical Turquoise

#00706C · ΔE 7.7

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 #31827B?

#31827B is Apatite Blue, a deep green with a cool undertone.

Is #31827B warm or cool?

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

What rooms work best with Apatite Blue?

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

What colors pair well with Apatite Blue?

Apatite Blue 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 Apatite Blue?

You can download Apatite Blue 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 Apatite Blue?

The hex code is #31827B. In RGB it's 49, 130, 123, and in HSL it's 175°, 45%, 35%.

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