GREENS

Radioactive Lilypad

#66DD00

RGB 102, 221, 0 · HSL 92°, 100%, 43% · CMYK 54, 0, 100, 13

Radioactive Lilypad is #66DD00 in HEX — rgb(102, 221, 0), hsl(92°, 100%, 43%), cmyk(54%, 0%, 100%, 13%).

Radioactive Lilypad pulls into the rich end of the greens spectrum — HSL 92°, 100%, 43%. 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#66DD00

RGB102, 221, 0

HSL92°, 100%, 43%

HSV92°, 100%, 87%

CMYK54, 0, 100, 13

Decimal6741248

CSS RGBrgb(102, 221, 0)

CSS HSLhsl(92, 100%, 43%)

Paint Matches — this color across 16 brands

Behr

Caterpillar 430B-6

ΔE 4.3 · #54DC00

Dulux

Effervescent Lime S21H9 · SB8B6

ΔE 21.2 · #9EDA2C

RAL

Luminous Green 6038

ΔE 23.8 · #00BB2D

Benjamin Moore

Paradise 2031-20

ΔE 25.6 · #63B525

Vista Paint

Wilderness Retreat K-320

ΔE 27.5 · #5AB32C

Kobra

Fluo 52

ΔE 29.3 · #00B131

Dutch Boy

Temptations VS-9503

ΔE 31.3 · #A3CD39

Dunn-Edwards

Leprechaun DEA126

ΔE 34.6 · #6CB037

Sherwin-Williams

Electric Lime SW6921

ΔE 36 · #9ABA25

PPG

Funky Frog 1221-7

ΔE 37.7 · #98BD3C

Valspar

Martian 6007-8C

ΔE 39.3 · #A7C646

Hallman-Lindsay

Green Gone Wild 774

ΔE 44.1 · #73A236

Kilz

Vivid Lime RH100

ΔE 45 · #52A84C

Colorhouse

Petal .02 Petal-02

ΔE 48.8 · #C3D263

IKEA

IKEA021 21

ΔE 60.7 · #BEC675

Farrow & Ball

Babouche 223

ΔE 70.9 · #ECC363

Light Reflectance & Undertone

Light Reflectance Value (LRV)

55/100

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

TemperatureNeutral MasstoneYellow-Green UndertoneYellow

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

Color Theory

Complementary

#66DD00

#7500DB

Analogous

#D4DB00

#66DD00

#00DB07

Triadic

#66DD00

#0066DB

#DB0066

Split-Complementary

#66DD00

#0700DB

#DB00D4

Tetradic

#66DD00

#00D4DB

#7500DB

#DB0700

Monochromatic

#1F4200

#438F00

#66DD00

#8DFF29

#B6FF75

Rectangle

#66DD00

#00DB75

#7500DB

#DB0066

Compound

#66DD00

#00DB07

#7500DB

#DB00D4

Variations

Lighter

#83FF16

#A3F25E

#CAF0A9

Darker

#52AF00

#387900

#214600

Saturation

#6B8F4D

#66DB00

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

1.76:1

Fail

vs Black

11.91:1

AAA

Deuteranopia

#66DD00

#C8B426

Original → Simulated

Protanopia

#66DD00

#CFCF56

Original → Simulated

Tritanopia

#66DD00

#7ECBD2

Original → Simulated

Color Psychology

Calm · Restorative

Radioactive Lilypad 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

#8CD21B

Warm Bulb 2700K

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

#66DD00

Daylight 5500K

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

#79D73F

Cool Bulb 6500K

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

Pairs With

#EAEEE7

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.

#6213A8

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: #66DD00;

CSS — background

background-color: #66DD00;

CSS Variable

--color-radioactive-lilypad: #66DD00;

Tailwind v3 — config

colors: { 'radioactive-lilypad': '#66DD00' }

Tailwind — arbitrary

bg-[#66DD00] text-[#66DD00]

SCSS

$radioactive-lilypad: #66DD00;

Similar Colors

Paradise Green

#62B424 · ΔE 25.8

Neon Lime

#50AB18 · ΔE 26.7

Sweet Pea

#78BF38 · ΔE 27.9

Lime Green

#97C100 · ΔE 28.9

Margarita

#A4C700 · ΔE 30.7

Tropical Seaweed Green

#48AB2C · ΔE 30.7

Lucky Charm Green

#61B83E · ΔE 31.0

Lizard Green

#33A122 · ΔE 32.8

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 #66DD00?

#66DD00 is Radioactive Lilypad, a mid-tone green with a warm undertone.

Is #66DD00 warm or cool?

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

What rooms work best with Radioactive Lilypad?

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

What colors pair well with Radioactive Lilypad?

Radioactive Lilypad 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 Radioactive Lilypad?

You can download Radioactive Lilypad 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 Radioactive Lilypad?

The hex code is #66DD00. In RGB it's 102, 221, 0, and in HSL it's 92°, 100%, 43%.

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