GREENS

Onsen

#66EEBB

RGB 102, 238, 187 · HSL 158°, 80%, 67% · CMYK 57, 0, 21, 7

Onsen is #66EEBB in HEX — rgb(102, 238, 187), hsl(158°, 80%, 67%), cmyk(57%, 0%, 21%, 7%).

Onsen pulls into the light end of the greens spectrum — HSL 158°, 80%, 67%. The saturated saturation makes it bold and immediate, 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#66EEBB

RGB102, 238, 187

HSL158°, 80%, 67%

HSV158°, 57%, 93%

CMYK57, 0, 21, 7

Decimal6745787

CSS RGBrgb(102, 238, 187)

CSS HSLhsl(158, 80%, 67%)

Paint Matches — this color across 16 brands

Behr

Jamaican Sea 510B-5

ΔE 5.3 · #66FACC

Dulux

Fresco Green S25H4

ΔE 12 · #7BD9AA

Dunn-Edwards

Vegetation DE5676

ΔE 12.2 · #5CCD97

Benjamin Moore

Adam 2037-40

ΔE 13.6 · #54C89A

Vista Paint

Day in the Garden K-282

ΔE 15.4 · #49C49C

PPG

Crystal Gem 1227-4

ΔE 16 · #79D0A7

Valspar

New Meadow 6002-10B

ΔE 17.5 · #4EC19D

Kobra

Green 32

ΔE 18.1 · #75C89E

Kilz

Iguana RG220-02

ΔE 20.9 · #95D3A3

Hallman-Lindsay

Blue Green Scene 716

ΔE 21 · #56B78F

Sherwin-Williams

Tantalizing Teal SW6937

ΔE 25.2 · #87DCCE

RAL

Pastel Green 6019

ΔE 25.3 · #BDECB6

Colorhouse

Thrive .04 Thrive-04

ΔE 30.2 · #A2C8A1

IKEA

IKEA165 165

ΔE 31.1 · #91D0C5

Dutch Boy

Wonder Woods DCP-0772

ΔE 32.1 · #B9D696

Farrow & Ball

Arsenic 214

ΔE 32.4 · #84B59C

Light Reflectance & Undertone

Light Reflectance Value (LRV)

68/100

Light

0 · DarkLight · 100

Reflects plenty of light and keeps spaces feeling open and airy while still showing clear colour. A safe, flexible choice for living areas.

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

#66EEBB

#EE6899

Analogous

#68EE79

#66EEBB

#68DCEE

Triadic

#66EEBB

#BD68EE

#EEBD68

Split-Complementary

#66EEBB

#EE68DC

#EE7968

Tetradic

#66EEBB

#7968EE

#EE6899

#DCEE68

Monochromatic

#13AA72

#23E79F

#66EEBB

#ACF6DB

#E8FCF5

Rectangle

#66EEBB

#6899EE

#EE6899

#EEBD68

Compound

#66EEBB

#68DCEE

#EE6899

#EE7968

Variations

Lighter

#86F2CA

#AAEFD6

#D1F2E6

Darker

#25ECA3

#0BB174

#046944

Saturation

#97BFB0

#68EEBD

#5FF7BF

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

1.45:1

Fail

vs Black

14.51:1

AAA

Deuteranopia

#66EEBB

#CBC8BF

Original → Simulated

Protanopia

#66EEBB

#DEDEC3

Original → Simulated

Tritanopia

#66EEBB

#77E5E6

Original → Simulated

Color Psychology

Calm · Restorative

Onsen 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

#8CDFA7

Warm Bulb 2700K

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

#66EEBB

Daylight 5500K

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

#79E4CC

Cool Bulb 6500K

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

Pairs With

#E8EEEB

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.

#DC477D

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 · Trim · Soft furniture

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: #66EEBB;

CSS — background

background-color: #66EEBB;

CSS Variable

--color-onsen: #66EEBB;

Tailwind v3 — config

colors: { 'onsen': '#66EEBB' }

Tailwind — arbitrary

bg-[#66EEBB] text-[#66EEBB]

SCSS

$onsen: #66EEBB;

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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 #66EEBB?

#66EEBB is Onsen, a soft green with a cool undertone.

Is #66EEBB warm or cool?

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

What rooms work best with Onsen?

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

What colors pair well with Onsen?

Onsen 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 Onsen?

You can download Onsen 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 Onsen?

The hex code is #66EEBB. In RGB it's 102, 238, 187, and in HSL it's 158°, 80%, 67%.

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