#66CC33 Color

#66CC33 is rgb(102, 204, 51) in RGB, hsl(100, 60%, 50%) in HSL, and about cmyk(50%, 0%, 75%, 20%) in CMYK. It has no registered color name of its own — the closest is Kelly Green (#4CBB17), clearly related but distinguishable side by side at ΔE 6.83. Black text is the more readable choice on this background.

#66CC33

HEX#66CC33

RGBrgb(102, 204, 51)

HSLhsl(100, 60%, 50%)

HSVhsv(100, 75%, 80%)

CMYKcmyk(50%, 0%, 75%, 20%)

OKLCHoklch(75.5% 0.208 137.5)

LABlab(73.83% -50.21 61.46)

LCHlch(73.83% 79.36 129.25)

What #66CC33 Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #66CC33, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Kelly Green#4CBB17ΔE 6.83 SGBUS Green#55DD33ΔE 11.7 Lime Green#32CD32ΔE 11.79 Vivid Malachite#00CC33ΔE 15.62 Green (RYB)#66B032ΔE 15.63 Dark Pastel Green#03C03CΔE 16.05

Browse the full index of named colors A-Z or every green in the library.

#66CC33 Channel Values

How #66CC33 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 102 · G 204 · B 51	8-bit channels as sent to the display
HSL	H 100° · S 60% · L 50%	Easiest model for building lighter and darker variants
HSV	H 100° · S 75% · V 80%	Matches the picker in most design tools
CMYK	C 50% · M 0% · Y 75% · K 20%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	2.05:1 vs white · 10.25:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66CC33 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

Fails AAWhite text2.05:1AA normal AA large AAA normal

TextBlack text10.25:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66CC33 in the contrast checker.

Colors That Go With #66CC33

Pairings derived from color-wheel relationships. The complementary color sits opposite #66CC33; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #66CC33

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66CC33.

How #66CC33 Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#66CC33

Protanopia#BFBF35

Protanomaly#A3C534

Deuteranopia#B3B33D

Deuteranomaly#9ABD39

Tritanopia#7DC1C1

Tritanomaly#75C59C

Achromatopsia#B5B5B5

Test a full palette in the color blindness simulator.

Using #66CC33 in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-66cc33: #66CC33;

CSS backgroundbackground-color: #66CC33;

Tailwind configcolors: { 'color-66cc33': '#66CC33' }

SwiftUIColor(red: 0.400, green: 0.800, blue: 0.200)

Android XML<color name="color_66cc33">#66CC33</color>

SVG fillfill="#66CC33"

More Green Colors

#66CC33 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

66cc66 66cc00 66cc99 66b032 66cdaa 669966 66ff00 669933 66ff33 669900 66ff66 65e765 84db00 99ff33 addfad c9dc87 ddf719 004200 00995e 00ff66 143d27 28350d 354230 4b7c4b

#66CC33 Frequently Asked Questions

What color is #66CC33?

#66CC33 is a mid-tone green — rgb(102, 204, 51) in RGB and hsl(100, 60%, 50%) in HSL. It carries no registered color name of its own; the closest named color is Kelly Green (#4CBB17), which is clearly related but distinguishable side by side at a CIE76 distance of 6.83.

What is the RGB value of #66CC33?

#66CC33 is rgb(102, 204, 51) — red 102, green 204, and blue 51 on the 0-255 scale.

What is the CMYK value of #66CC33?

#66CC33 converts to approximately cmyk(50%, 0%, 75%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66CC33 be black or white?

Black text is the more readable choice. #66CC33 scores 2.05:1 against white and 10.25:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66CC33 as a CSS color keyword?

No. #66CC33 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is limegreen (#32CD32) at a CIE76 distance of 11.79, which is visibly different.

Open #66CC33 in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every green in the color library, the guide to shades of green, or the full color library.