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#66B78F Color

#66B78F is rgb(102, 183, 143) in RGB, hsl(150, 36%, 56%) in HSL, and about cmyk(44%, 0%, 22%, 28%) in CMYK. It has no registered color name of its own — the closest is Shiny Shamrock (#5FA778), clearly related but distinguishable side by side at ΔE 7.44. Black text is the more readable choice on this background.

#66B78F
HEX#66B78F
RGBrgb(102, 183, 143)
HSLhsl(150, 36%, 56%)
HSVhsv(150, 44%, 72%)
CMYKcmyk(44%, 0%, 22%, 28%)
OKLCHoklch(71.6% 0.1 160.9)
LABlab(68.44% -33.01 12.34)
LCHlch(68.44% 35.24 159.50)

What #66B78F 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 #66B78F, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Shiny Shamrock#5FA778ΔE 7.44Forest Green (Crayola)#5FA777ΔE 7.76Medium Aquamarine#66CDAAΔE 9.66Jungle Green#29AB87ΔE 11.78Zomp#39A78EΔE 11.83Mountain Meadow#30BA8FΔE 12.65

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

#66B78F Channel Values

How #66B78F 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 183 · B 1438-bit channels as sent to the display
HSLH 150° · S 36% · L 56%Easiest model for building lighter and darker variants
HSVH 150° · S 44% · V 72%Matches the picker in most design tools
CMYKC 44% · M 0% · Y 22% · K 28%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.4:1 vs white · 8.73:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66B78F 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 text2.4:1AA normal AA large AAA normal
TextBlack text8.73:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66B78F in the contrast checker.

Colors That Go With #66B78F

Pairings derived from color-wheel relationships. The complementary color sits opposite #66B78F; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#66B78F
Complementary
#B7668F
Analogous
#66B766
Analogous
#66B7B7
Triadic
#8F66B7
Triadic
#B78F66
Split comp.
#B766B7
Split comp.
#B76666

Tints & Shades of #66B78F

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

#7BC19E
#90CBAD
#A5D5BD
#BADECC
#CEE8DB
#E3F2EB

Shades

#50AA7D
#438E69
#377657
#2A5A42
#1F4230
#12261C

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66B78F.

How #66B78F 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#66B78F
Protanopia#ADAD8F
Protanomaly#95B18F
Deuteranopia#A2A291
Deuteranomaly#8EAB90
Tritanopia#6FB3B3
Tritanomaly#6BB4A6
Achromatopsia#A7A7A7

Test a full palette in the color blindness simulator.

Using #66B78F in Code

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

CSS custom property--color-66b78f: #66B78F;
CSS backgroundbackground-color: #66B78F;
Tailwind configcolors: { 'color-66b78f': '#66B78F' }
SwiftUIColor(red: 0.400, green: 0.718, blue: 0.561)
Android XML<color name="color_66b78f">#66B78F</color>
SVG fillfill="#66B78F"

More Green Colors

#66B78F sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#66B78F Frequently Asked Questions

What color is #66B78F?

#66B78F is a mid-tone green — rgb(102, 183, 143) in RGB and hsl(150, 36%, 56%) in HSL. It carries no registered color name of its own; the closest named color is Shiny Shamrock (#5FA778), which is clearly related but distinguishable side by side at a CIE76 distance of 7.44.

What is the RGB value of #66B78F?

#66B78F is rgb(102, 183, 143) — red 102, green 183, and blue 143 on the 0-255 scale.

What is the CMYK value of #66B78F?

#66B78F converts to approximately cmyk(44%, 0%, 22%, 28%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66B78F be black or white?

Black text is the more readable choice. #66B78F scores 2.4:1 against white and 8.73:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66B78F as a CSS color keyword?

No. #66B78F 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 mediumaquamarine (#66CDAA) at a CIE76 distance of 9.66, which is clearly related but distinguishable side by side.

Open #66B78F 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.