#99FF66 Color

#99FF66 is rgb(153, 255, 102) in RGB, hsl(100, 100%, 70%) in HSL, and about cmyk(40%, 0%, 60%, 0%) in CMYK. It has no registered color name of its own — the closest is Screamin' Green (#66FF66), visibly different at ΔE 13.87. Black text is the more readable choice on this background.

#99FF66

HEX#99FF66

RGBrgb(153, 255, 102)

HSLhsl(100, 100%, 70%)

HSVhsv(100, 60%, 100%)

CMYKcmyk(40%, 0%, 60%, 0%)

OKLCHoklch(90.7% 0.212 136.6)

LABlab(91.50% -50.44 61.39)

LCHlch(91.50% 79.46 129.41)

What #99FF66 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 #99FF66, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Screamin' Green#66FF66ΔE 13.87 French Lime#9EFD38ΔE 15.37 Inchworm#B2EC5DΔE 15.87 Green Lizard#A7F432ΔE 16.7 SGBUS Green#55DD33ΔE 16.74 Green Yellow#ADFF2FΔE 19.49

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

#99FF66 Channel Values

How #99FF66 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 153 · G 255 · B 102	8-bit channels as sent to the display
HSL	H 100° · S 100% · L 70%	Easiest model for building lighter and darker variants
HSV	H 100° · S 60% · V 100%	Matches the picker in most design tools
CMYK	C 40% · M 0% · Y 60% · K 0%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.25:1 vs white · 16.85:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #99FF66 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 text1.25:1AA normal AA large AAA normal

TextBlack text16.85:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #99FF66 in the contrast checker.

Colors That Go With #99FF66

Pairings derived from color-wheel relationships. The complementary color sits opposite #99FF66; 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 #99FF66

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 #99FF66.

How #99FF66 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#99FF66

Protanopia#F2F267

Protanomaly#D4F767

Deuteranopia#E4E46D

Deuteranomaly#CAEF6A

Tritanopia#AFF2F2

Tritanomaly#A7F8CA

Achromatopsia#E6E6E6

Test a full palette in the color blindness simulator.

Using #99FF66 in Code

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

CSS custom property--color-99ff66: #99FF66;

CSS backgroundbackground-color: #99FF66;

Tailwind configcolors: { 'color-99ff66': '#99FF66' }

SwiftUIColor(red: 0.600, green: 1.000, blue: 0.400)

Android XML<color name="color_99ff66">#99FF66</color>

SVG fillfill="#99FF66"

More Green Colors

#99FF66 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

99ff99 99ff33 99ffcc 99ff00 9ab973 99e6b3 9acd32 99cc99 9ae600 99cc66 9bff05 99cc33 adebad cae00d ddfedd 004225 009966 00ff7f 155615 284328 35431e 4c9141 669900 7cfc00

#99FF66 Frequently Asked Questions

What color is #99FF66?

#99FF66 is a light green — rgb(153, 255, 102) in RGB and hsl(100, 100%, 70%) in HSL. It carries no registered color name of its own; the closest named color is Screamin' Green (#66FF66), which is visibly different at a CIE76 distance of 13.87.

What is the RGB value of #99FF66?

#99FF66 is rgb(153, 255, 102) — red 153, green 255, and blue 102 on the 0-255 scale.

What is the CMYK value of #99FF66?

#99FF66 converts to approximately cmyk(40%, 0%, 60%, 0%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #99FF66 be black or white?

Black text is the more readable choice. #99FF66 scores 1.25:1 against white and 16.85:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #99FF66 as a CSS color keyword?

No. #99FF66 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 greenyellow (#ADFF2F) at a CIE76 distance of 19.49, which is visibly different.

Open #99FF66 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.