GREENS

Algal Fuel

#21C36F

RGB 33, 195, 111 · HSL 149°, 71%, 45% · CMYK 83, 0, 43, 24

Algal Fuel is #21C36F in HEX — rgb(33, 195, 111), hsl(149°, 71%, 45%), cmyk(83%, 0%, 43%, 24%).

Algal Fuel pulls into the mid-tone end of the greens spectrum — HSL 149°, 71%, 45%. The saturated saturation makes it bold and immediate, 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#21C36F

RGB33, 195, 111

HSL149°, 71%, 45%

HSV149°, 83%, 76%

CMYK83, 0, 43, 24

Decimal2212719

CSS RGBrgb(33, 195, 111)

CSS HSLhsl(149, 71%, 45%)

Paint Matches — this color across 16 brands

Behr

Esmeralda P440-6

ΔE 3.6 · #36C56B

Dunn-Edwards

Artificial Turf DE5635

ΔE 9.3 · #41B45C

Dulux

Ceramic Green S25H7

ΔE 9.6 · #3BB76F

Benjamin Moore

Fresh 2033-30

ΔE 11.2 · #32AB51

PPG

Leap Frog 1225-7

ΔE 13.8 · #41A94F

Vista Paint

Elmvale K-313

ΔE 14.7 · #69C365

Valspar

Spinach 6004-10C

ΔE 15.7 · #48A759

Kilz

Vivid Lime RH100

ΔE 17.7 · #52A84C

RAL

Pure Green 6037

ΔE 19.8 · #008F39

Kobra

Fluo 52

ΔE 22.3 · #00B131

Hallman-Lindsay

Aqueous 731

ΔE 22.8 · #56A05B

Sherwin-Williams

Jitterbug Jade SW6987

ΔE 23.7 · #019D6E

Dutch Boy

Green Peace VS-9505

ΔE 24.2 · #8AC867

Colorhouse

Thrive .06 Thrive-06

ΔE 31.7 · #128458

IKEA

IKEA114 114

ΔE 38.5 · #93AB67

Farrow & Ball

Arsenic 214

ΔE 43.8 · #84B59C

Light Reflectance & Undertone

Light Reflectance Value (LRV)

41/100

Medium

0 · DarkLight · 100

Balanced reflectance — holds colour without washing out. Versatile for most rooms and the most forgiving range for true-to-chip results.

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

#21C36F

#C42175

Analogous

#24C421

#21C36F

#21C4C2

Triadic

#21C36F

#7021C4

#C47021

Split-Complementary

#21C36F

#C221C4

#C42124

Tetradic

#21C36F

#2124C4

#C42175

#C4C221

Monochromatic

#0B4125

#16834B

#21C36F

#51E197

#92EDBE

Rectangle

#21C36F

#2175C4

#C42175

#C47021

Compound

#21C36F

#21C4C2

#C42175

#C42124

Variations

Lighter

#3FDE8C

#78DEA9

#B6E6CD

Darker

#17A05A

#0E703D

#074324

Saturation

#5A8B72

#21C470

#11D56F

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

2.31:1

Fail

vs Black

9.10:1

AAA

Deuteranopia

#21C36F

#A59C74

Original → Simulated

Protanopia

#21C36F

#B4B47E

Original → Simulated

Tritanopia

#21C36F

#46B7BA

Original → Simulated

Color Psychology

Calm · Restorative

Algal Fuel 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

#58BF6E

Warm Bulb 2700K

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

#21C36F

Daylight 5500K

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

#45C493

Cool Bulb 6500K

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

Pairs With

#E8EDEB

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.

#9C2763

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: #21C36F;

CSS — background

background-color: #21C36F;

CSS Variable

--color-algal-fuel: #21C36F;

Tailwind v3 — config

colors: { 'algal-fuel': '#21C36F' }

Tailwind — arbitrary

bg-[#21C36F] text-[#21C36F]

SCSS

$algal-fuel: #21C36F;

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#00983C · ΔE 17.0

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#4EB245 · ΔE 17.4

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#72CC88 · ΔE 18.4

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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 #21C36F?

#21C36F is Algal Fuel, a mid-tone green with a warm undertone.

Is #21C36F warm or cool?

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

What rooms work best with Algal Fuel?

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

What colors pair well with Algal Fuel?

Algal Fuel 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 Algal Fuel?

You can download Algal Fuel 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 Algal Fuel?

The hex code is #21C36F. In RGB it's 33, 195, 111, and in HSL it's 149°, 71%, 45%.

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