GREENS

Once

#299051

RGB 41, 144, 81 · HSL 143°, 56%, 36% · CMYK 72, 0, 44, 44

Once is #299051 in HEX — rgb(41, 144, 81), hsl(143°, 56%, 36%), cmyk(72%, 0%, 44%, 44%).

Once pulls into the rich end of the greens spectrum — HSL 143°, 56%, 36%. The balanced saturation makes it confident without overpowering, and the hue reads warm. 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#299051

RGB41, 144, 81

HSL143°, 56%, 36%

HSV143°, 72%, 56%

CMYK72, 0, 44, 44

Decimal2723921

CSS RGBrgb(41, 144, 81)

CSS HSLhsl(143, 56%, 36%)

Paint Matches — this color across 16 brands

Benjamin Moore

Once 574

Exact match

Dulux

St.Patrick S25G8

ΔE 2.2 · #2B8C4B

Valspar

Luscious Green 6010-7

ΔE 3.2 · #238848

Dunn-Edwards

Shamrock Field DE5664

ΔE 4.1 · #358D52

Behr

Mermaid Harbor 490B-7

ΔE 4.7 · #1B915A

RAL

Traffic Green 6024

ΔE 5.9 · #308446

Vista Paint

Center Field K-280

ΔE 6.2 · #008B56

PPG

Green Gloss 1227-7

ΔE 6.5 · #00955E

Sherwin-Williams

Lucky Green SW6926

ΔE 6.9 · #238652

Kilz

Magical Hummingbird RH120

ΔE 7.1 · #2B834C

Dutch Boy

Green Grass VS-9552

ΔE 9.2 · #53995A

Hallman-Lindsay

Tingle 732

ΔE 9.8 · #2B7B37

Kobra

Green 34

ΔE 10.7 · #42A370

Colorhouse

Thrive .06 Thrive-06

ΔE 11.1 · #128458

IKEA

IKEA132 132

ΔE 21.6 · #507A4F

Farrow & Ball

Yeabridge Green 287

ΔE 32.4 · #919F70

Light Reflectance & Undertone

Light Reflectance Value (LRV)

21/100

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

TemperatureNeutral MasstoneGreen UndertoneBlue

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

Color Theory

Complementary

#299051

#8F2868

Analogous

#348F28

#299051

#288F83

Triadic

#299051

#50288F

#8F5028

Split-Complementary

#299051

#83288F

#8F2834

Tetradic

#299051

#28348F

#8F2868

#8F8328

Monochromatic

#07180D

#18542F

#299051

#3CC872

#78D99D

Rectangle

#299051

#28688F

#8F2868

#8F5028

Compound

#299051

#288F83

#8F2868

#8F2834

Variations

Lighter

#37C26C

#6ECC92

#AFDCC1

Darker

#1E753F

#13522B

#0A3019

Saturation

#4C6B58

#288F50

#14A34B

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

4.04:1

AA Large

vs Black

5.20:1

Deuteranopia

#299051

#7B7455

Original → Simulated

Protanopia

#299051

#85855C

Original → Simulated

Tritanopia

#299051

#3C8789

Original → Simulated

Color Psychology

Calm · Restorative

Once 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

#5E9958

Warm Bulb 2700K

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

#299051

Daylight 5500K

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

#4B9E7C

Cool Bulb 6500K

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

Pairs With

#E9EDEA

Trim

Matched off-white

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

#F7F8F7

Ceiling

Whisper tint

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

#732957

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: #299051;

CSS — background

background-color: #299051;

CSS Variable

--color-once: #299051;

Tailwind v3 — config

colors: { 'once': '#299051' }

Tailwind — arbitrary

bg-[#299051] text-[#299051]

SCSS

$once: #299051;

Similar Colors

Once Upon a Time

#288F50 · ΔE 0.4

Jade Green

#00874A · ΔE 4.5

Grassy Fields

#448C4E · ΔE 7.5

Vine Green

#2F7D3F · ΔE 8.8

Kelly Green

#00A162 · ΔE 9.0

Green with Envy

#429565 · ΔE 10.6

Nile Green

#348354 · ΔE 11.4

Floradale Isle

#31976B · ΔE 11.5

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 #299051?

#299051 is Once, a deep green with a warm undertone.

Is #299051 warm or cool?

Once reads warm, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Once?

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

What colors pair well with Once?

Once 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 Once?

You can download Once 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 Once?

The hex code is #299051. In RGB it's 41, 144, 81, and in HSL it's 143°, 56%, 36%.

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