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#66F5CF Color

#66F5CF is rgb(102, 245, 207) in RGB, hsl(164, 88%, 68%) in HSL, and about cmyk(58%, 0%, 16%, 4%) in CMYK. It has no registered color name of its own — the closest is Aquamarine (#7FFFD4), clearly related but distinguishable side by side at ΔE 5.34. Black text is the more readable choice on this background.

#66F5CF
HEX#66F5CF
RGBrgb(102, 245, 207)
HSLhsl(164, 88%, 68%)
HSVhsv(164, 58%, 96%)
CMYKcmyk(58%, 0%, 16%, 4%)
OKLCHoklch(88.2% 0.135 172.7)
LABlab(88.06% -47.16 6.20)
LCHlch(88.06% 47.56 172.51)

What #66F5CF 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 #66F5CF, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Aquamarine#7FFFD4ΔE 5.34Spearmint#4FE7B0ΔE 10.84Eucalyptus#44D7A8ΔE 11.91Turquoise#40E0D0ΔE 13.15Olo#01FFCDΔE 14.09Sea Green (Crayola)#00FFCDΔE 14.11

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

#66F5CF Channel Values

How #66F5CF 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 245 · B 2078-bit channels as sent to the display
HSLH 164° · S 88% · L 68%Easiest model for building lighter and darker variants
HSVH 164° · S 58% · V 96%Matches the picker in most design tools
CMYKC 58% · M 0% · Y 16% · K 4%Approximate ink mix; confirm with an ICC profile before printing
Luminance1.35:1 vs white · 15.53:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66F5CF 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 text1.35:1AA normal AA large AAA normal
TextBlack text15.53:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66F5CF in the contrast checker.

Colors That Go With #66F5CF

Pairings derived from color-wheel relationships. The complementary color sits opposite #66F5CF; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#66F5CF
Complementary
#F5668C
Analogous
#66F587
Analogous
#66D4F5
Triadic
#CF66F5
Triadic
#F5CF66
Split comp.
#F566D4
Split comp.
#F58766

Tints & Shades of #66F5CF

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

#79F6D5
#91F8DC
#A4F9E2
#B7FAE8
#CAFCEE
#E2FDF6

Shades

#3AF2C1
#0FF0B4
#0DC593
#099570
#07694F
#043E2F

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66F5CF.

How #66F5CF 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#66F5CF
Protanopia#E5E5D0
Protanomaly#BFEBCF
Deuteranopia#D4D4D2
Deuteranomaly#B2E2D1
Tritanopia#72F1F1
Tritanomaly#6EF2E4
Achromatopsia#DDDDDD

Test a full palette in the color blindness simulator.

Using #66F5CF in Code

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

CSS custom property--color-66f5cf: #66F5CF;
CSS backgroundbackground-color: #66F5CF;
Tailwind configcolors: { 'color-66f5cf': '#66F5CF' }
SwiftUIColor(red: 0.400, green: 0.961, blue: 0.812)
Android XML<color name="color_66f5cf">#66F5CF</color>
SVG fillfill="#66F5CF"

More Green Colors

#66F5CF sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#66F5CF Frequently Asked Questions

What color is #66F5CF?

#66F5CF is a light green — rgb(102, 245, 207) in RGB and hsl(164, 88%, 68%) in HSL. It carries no registered color name of its own; the closest named color is Aquamarine (#7FFFD4), which is clearly related but distinguishable side by side at a CIE76 distance of 5.34.

What is the RGB value of #66F5CF?

#66F5CF is rgb(102, 245, 207) — red 102, green 245, and blue 207 on the 0-255 scale.

What is the CMYK value of #66F5CF?

#66F5CF converts to approximately cmyk(58%, 0%, 16%, 4%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66F5CF be black or white?

Black text is the more readable choice. #66F5CF scores 1.35:1 against white and 15.53:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66F5CF as a CSS color keyword?

No. #66F5CF 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 aquamarine (#7FFFD4) at a CIE76 distance of 5.34, which is clearly related but distinguishable side by side.

Open #66F5CF 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.