GREENS

Thermal

#3F5052

RGB 63, 80, 82 · HSL 186°, 13%, 28% · CMYK 23, 2, 0, 68

Thermal is #3F5052 in HEX — rgb(63, 80, 82), hsl(186°, 13%, 28%), cmyk(23%, 2%, 0%, 68%).

Thermal pulls into the deep end of the greens spectrum — HSL 186°, 13%, 28%. 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#3F5052

RGB63, 80, 82

HSL186°, 13%, 28%

HSV186°, 23%, 32%

CMYK23, 2, 0, 68

Decimal4149330

CSS RGBrgb(63, 80, 82)

CSS HSLhsl(186, 13%, 28%)

Paint Matches — this color across 16 brands

Dunn-Edwards

Lunar Eclipse DE5776

ΔE 1.1 · #415053

Valspar

Deep River Green 5010-3

ΔE 1.3 · #404E50

Hallman-Lindsay

Calm Interlude 501

ΔE 1.8 · #3C4D51

Benjamin Moore

Navy 1652

ΔE 2.1 · #445256

Vista Paint

Deep Space C-486

ΔE 2.1 · #425251

PPG

Night Watch 1145-7

ΔE 2.4 · #3C504F

Behr

Black Space BXC-30

ΔE 2.5 · #3E4B4E

Kilz

Oceans Deep TB-60

ΔE 2.9 · #395255

Dulux

Copycat SG5C7

ΔE 3 · #435157

RAL

Iron Grey 7011

ΔE 3.8 · #434B4D

Sherwin-Williams

Mount Etna SW7625

ΔE 4 · #3D484C

IKEA

IKEA152 152

ΔE 4.4 · #494F50

Farrow & Ball

Hague Blue 30

ΔE 4.5 · #3D4E57

Colorhouse

Metal .06 Metal-06

ΔE 5.3 · #3F4647

Dutch Boy

Seal of Grey VS-9301

ΔE 8.2 · #575757

Kobra

Green 38

ΔE 9 · #415448

Light Reflectance & Undertone

Light Reflectance Value (LRV)

7/100

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

#3F5052

#51403E

Analogous

#3E5149

#3F5052

#3E4651

Triadic

#3F5052

#513E4F

#4F513E

Split-Complementary

#3F5052

#513E46

#51493E

Tetradic

#3F5052

#493E51

#51403E

#46513E

Monochromatic

#0B0E0E

#1D2525

#3F5052

#5F797C

#869FA2

Rectangle

#3F5052

#403E51

#51403E

#4F513E

Compound

#3F5052

#3E4651

#51403E

#51493E

Variations

Lighter

#5E777A

#859B9D

#B9C3C5

Darker

#313F41

#222C2D

#131A1A

Saturation

#454A4A

#3E4F51

#1F6870

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

8.47:1

AAA

vs Black

2.48:1

Fail

Deuteranopia

#3F5052

#494B53

Original → Simulated

Protanopia

#3F5052

#4D4D52

Original → Simulated

Tritanopia

#3F5052

#3F504F

Original → Simulated

Color Psychology

Calm · Restorative

Thermal 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

#6F6959

Warm Bulb 2700K

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

#3F5052

Daylight 5500K

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

#5C6E7D

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.

#4C312E

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: #3F5052;

CSS — background

background-color: #3F5052;

CSS Variable

--color-thermal: #3F5052;

Tailwind v3 — config

colors: { 'thermal': '#3F5052' }

Tailwind — arbitrary

bg-[#3F5052] text-[#3F5052]

SCSS

$thermal: #3F5052;

Similar Colors

Amazon Green

#415457 · ΔE 1.8

Narragansett Green

#435155 · ΔE 1.9

Lead Gray

#434E52 · ΔE 2.8

Everard Blue

#3D5459 · ΔE 3.0

Stonecutter

#434C4F · ΔE 3.4

Hidden Falls

#415451 · ΔE 3.6

Brush Blue

#414F57 · ΔE 4.1

Dark Pewter

#4B5756 · ΔE 4.2

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 #3F5052?

#3F5052 is Thermal, a deep green with a cool undertone.

Is #3F5052 warm or cool?

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

What rooms work best with Thermal?

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

What colors pair well with Thermal?

Thermal 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 Thermal?

You can download Thermal 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 Thermal?

The hex code is #3F5052. In RGB it's 63, 80, 82, and in HSL it's 186°, 13%, 28%.

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