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#66BD1F Color

#66BD1F is rgb(102, 189, 31) in RGB, hsl(93, 72%, 43%) in HSL, and about cmyk(46%, 0%, 84%, 26%) 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 7.02. Black text is the more readable choice on this background.

#66BD1F
HEX#66BD1F
RGBrgb(102, 189, 31)
HSLhsl(93, 72%, 43%)
HSVhsv(93, 84%, 74%)
CMYKcmyk(46%, 0%, 84%, 26%)
OKLCHoklch(71.6% 0.2 135.3)
LABlab(69.13% -45.62 62.81)
LCHlch(69.13% 77.63 125.99)

What #66BD1F 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 #66BD1F, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Kelly Green#4CBB17ΔE 7.02Microsoft Green#7DB700ΔE 10.81Green (RYB)#66B032ΔE 11.63Yellow Green#9ACD32ΔE 14.94Sheen Green#8FD400ΔE 15.99Vine Green#38A32AΔE 16.62

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

#66BD1F Channel Values

How #66BD1F breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 102 · G 189 · B 318-bit channels as sent to the display
HSLH 93° · S 72% · L 43%Easiest model for building lighter and darker variants
HSVH 93° · S 84% · V 74%Matches the picker in most design tools
CMYKC 46% · M 0% · Y 84% · K 26%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.37:1 vs white · 8.86:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66BD1F 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 text2.37:1AA normal AA large AAA normal
TextBlack text8.86:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66BD1F in the contrast checker.

Colors That Go With #66BD1F

Pairings derived from color-wheel relationships. The complementary color sits opposite #66BD1F; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#66BD1F
Complementary
#761FBD
Analogous
#B5BD1F
Analogous
#1FBD27
Triadic
#1F66BD
Triadic
#BD1F66
Split comp.
#271FBD
Split comp.
#BD1FB5

Tints & Shades of #66BD1F

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

#79DC28
#8FE24B
#A5E76E
#B8EC8D
#CEF2B0
#E4F8D3

Shades

#58A21A
#4C8C17
#3E7213
#325C0F
#23420B
#182C07

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66BD1F.

How #66BD1F 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#66BD1F
Protanopia#B2B221
Protanomaly#99B620
Deuteranopia#A7A72B
Deuteranomaly#91B027
Tritanopia#7AB2B2
Tritanomaly#73B78F
Achromatopsia#A8A8A8

Test a full palette in the color blindness simulator.

Using #66BD1F in Code

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

CSS custom property--color-66bd1f: #66BD1F;
CSS backgroundbackground-color: #66BD1F;
Tailwind configcolors: { 'color-66bd1f': '#66BD1F' }
SwiftUIColor(red: 0.400, green: 0.741, blue: 0.122)
Android XML<color name="color_66bd1f">#66BD1F</color>
SVG fillfill="#66BD1F"

More Green Colors

#66BD1F sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#66BD1F Frequently Asked Questions

What color is #66BD1F?

#66BD1F is a mid-tone green — rgb(102, 189, 31) in RGB and hsl(93, 72%, 43%) 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 7.02.

What is the RGB value of #66BD1F?

#66BD1F is rgb(102, 189, 31) — red 102, green 189, and blue 31 on the 0-255 scale.

What is the CMYK value of #66BD1F?

#66BD1F converts to approximately cmyk(46%, 0%, 84%, 26%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66BD1F be black or white?

Black text is the more readable choice. #66BD1F scores 2.37:1 against white and 8.86:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66BD1F as a CSS color keyword?

No. #66BD1F 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 yellowgreen (#9ACD32) at a CIE76 distance of 14.94, which is visibly different.

Open #66BD1F in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

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