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#66E5CE Color

#66E5CE is rgb(102, 229, 206) in RGB, hsl(169, 71%, 65%) in HSL, and about cmyk(55%, 0%, 10%, 10%) in CMYK. It has no registered color name of its own — the closest is Turquoise (#40E0D0), clearly related but distinguishable side by side at ΔE 6.66. Black text is the more readable choice on this background.

#66E5CE
HEX#66E5CE
RGBrgb(102, 229, 206)
HSLhsl(169, 71%, 65%)
HSVhsv(169, 55%, 90%)
CMYKcmyk(55%, 0%, 10%, 10%)
OKLCHoklch(84.4% 0.118 179.6)
LABlab(83.37% -41.07 0.01)
LCHlch(83.37% 41.07 179.99)

What #66E5CE 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 #66E5CE, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Turquoise#40E0D0ΔE 6.66Medium Turquoise#48D1CCΔE 11.48Medium Aquamarine#66CDAAΔE 11.55Bright Turquoise#08E8DEΔE 12.14Pearl Aqua#88D8C0ΔE 12.26Aquamarine#7FFFD4ΔE 13.04

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

#66E5CE Channel Values

How #66E5CE 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 229 · B 2068-bit channels as sent to the display
HSLH 169° · S 71% · L 65%Easiest model for building lighter and darker variants
HSVH 169° · S 55% · V 90%Matches the picker in most design tools
CMYKC 55% · M 0% · Y 10% · K 10%Approximate ink mix; confirm with an ICC profile before printing
Luminance1.54:1 vs white · 13.66:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66E5CE 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 text1.54:1AA normal AA large AAA normal
TextBlack text13.66:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66E5CE in the contrast checker.

Colors That Go With #66E5CE

Pairings derived from color-wheel relationships. The complementary color sits opposite #66E5CE; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#66E5CE
Complementary
#E5667E
Analogous
#66E58F
Analogous
#66BDE5
Triadic
#CE66E5
Triadic
#E5CE66
Split comp.
#E566BD
Split comp.
#E58F66

Tints & Shades of #66E5CE

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

#7CE9D5
#8EECDB
#A3EFE2
#B9F3E9
#CFF7F0
#E0FAF5

Shades

#3FDEC1
#23D1B1
#1DAA90
#16836F
#105C4E
#0A3930

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66E5CE.

How #66E5CE 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#66E5CE
Protanopia#D6D6CE
Protanomaly#B4DCCE
Deuteranopia#C7C7D1
Deuteranomaly#A9D3D0
Tritanopia#6DE2E2
Tritanomaly#6BE3DA
Achromatopsia#D0D0D0

Test a full palette in the color blindness simulator.

Using #66E5CE in Code

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

CSS custom property--color-66e5ce: #66E5CE;
CSS backgroundbackground-color: #66E5CE;
Tailwind configcolors: { 'color-66e5ce': '#66E5CE' }
SwiftUIColor(red: 0.400, green: 0.898, blue: 0.808)
Android XML<color name="color_66e5ce">#66E5CE</color>
SVG fillfill="#66E5CE"

More Green Colors

#66E5CE sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#66E5CE Frequently Asked Questions

What color is #66E5CE?

#66E5CE is a light green — rgb(102, 229, 206) in RGB and hsl(169, 71%, 65%) in HSL. It carries no registered color name of its own; the closest named color is Turquoise (#40E0D0), which is clearly related but distinguishable side by side at a CIE76 distance of 6.66.

What is the RGB value of #66E5CE?

#66E5CE is rgb(102, 229, 206) — red 102, green 229, and blue 206 on the 0-255 scale.

What is the CMYK value of #66E5CE?

#66E5CE converts to approximately cmyk(55%, 0%, 10%, 10%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66E5CE be black or white?

Black text is the more readable choice. #66E5CE scores 1.54:1 against white and 13.66:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66E5CE as a CSS color keyword?

No. #66E5CE 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 turquoise (#40E0D0) at a CIE76 distance of 6.66, which is clearly related but distinguishable side by side.

Open #66E5CE 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.