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#66C770 Color

#66C770 is rgb(102, 199, 112) in RGB, hsl(126, 46%, 59%) in HSL, and about cmyk(49%, 0%, 44%, 22%) in CMYK. It has no registered color name of its own — the closest is Mantis (#74C365), clearly related but distinguishable side by side at ΔE 6.58. Black text is the more readable choice on this background.

#66C770
HEX#66C770
RGBrgb(102, 199, 112)
HSLhsl(126, 46%, 59%)
HSVhsv(126, 49%, 78%)
CMYKcmyk(49%, 0%, 44%, 22%)
OKLCHoklch(74.9% 0.153 146)
LABlab(72.81% -43.61 34.31)
LCHlch(72.81% 55.49 141.81)

What #66C770 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 #66C770, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Mantis#74C365ΔE 6.58Emerald#50C878ΔE 6.75Pastel Green#77DD77ΔE 9.9Bud Green#7BB661ΔE 12.86Medium Sea Green#3CB371ΔE 13.25Light Green#90EE90ΔE 13.95

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

#66C770 Channel Values

How #66C770 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 199 · B 1128-bit channels as sent to the display
HSLH 126° · S 46% · L 59%Easiest model for building lighter and darker variants
HSVH 126° · S 49% · V 78%Matches the picker in most design tools
CMYKC 49% · M 0% · Y 44% · K 22%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.11:1 vs white · 9.97:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66C770 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 text2.11:1AA normal AA large AAA normal
TextBlack text9.97:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66C770 in the contrast checker.

Colors That Go With #66C770

Pairings derived from color-wheel relationships. The complementary color sits opposite #66C770; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#66C770
Complementary
#C766BD
Analogous
#8DC766
Analogous
#66C7A0
Triadic
#7066C7
Triadic
#C77066
Split comp.
#A066C7
Split comp.
#C7668D

Tints & Shades of #66C770

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

#7DCF85
#8FD696
#A6DEAB
#B8E5BD
#CFEDD2
#E1F4E3

Shades

#49BC54
#3BA045
#308238
#27682D
#1C4A20
#112D13

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66C770.

How #66C770 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#66C770
Protanopia#BBBB71
Protanomaly#A0C070
Deuteranopia#AFAF74
Deuteranomaly#97B972
Tritanopia#77BFBF
Tritanomaly#71C2A5
Achromatopsia#B3B3B3

Test a full palette in the color blindness simulator.

Using #66C770 in Code

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

CSS custom property--color-66c770: #66C770;
CSS backgroundbackground-color: #66C770;
Tailwind configcolors: { 'color-66c770': '#66C770' }
SwiftUIColor(red: 0.400, green: 0.780, blue: 0.439)
Android XML<color name="color_66c770">#66C770</color>
SVG fillfill="#66C770"

More Green Colors

#66C770 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#66C770 Frequently Asked Questions

What color is #66C770?

#66C770 is a mid-tone green — rgb(102, 199, 112) in RGB and hsl(126, 46%, 59%) in HSL. It carries no registered color name of its own; the closest named color is Mantis (#74C365), which is clearly related but distinguishable side by side at a CIE76 distance of 6.58.

What is the RGB value of #66C770?

#66C770 is rgb(102, 199, 112) — red 102, green 199, and blue 112 on the 0-255 scale.

What is the CMYK value of #66C770?

#66C770 converts to approximately cmyk(49%, 0%, 44%, 22%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66C770 be black or white?

Black text is the more readable choice. #66C770 scores 2.11:1 against white and 9.97:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66C770 as a CSS color keyword?

No. #66C770 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 mediumseagreen (#3CB371) at a CIE76 distance of 13.25, which is visibly different.

Open #66C770 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.