#66D4E5 Color

#66D4E5 is rgb(102, 212, 229) in RGB, hsl(188, 71%, 65%) in HSL, and about cmyk(55%, 7%, 0%, 10%) in CMYK. It has no registered color name of its own — the closest is Sky Blue (Crayola) (#76D7EA), very hard to tell apart at ΔE 3.61. Black text is the more readable choice on this background.

#66D4E5

HEX#66D4E5

RGBrgb(102, 212, 229)

HSLhsl(188, 71%, 65%)

HSVhsv(188, 55%, 90%)

CMYKcmyk(55%, 7%, 0%, 10%)

OKLCHoklch(81.2% 0.103 208.8)

LABlab(78.99% -29.33 -18.57)

LCHlch(78.99% 34.71 212.35)

What #66D4E5 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 #66D4E5, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Sky Blue (Crayola)#76D7EAΔE 3.61 Medium Sky Blue#80DAEBΔE 5.48 Middle Blue#7ED4E6ΔE 5.87 Aquamarine (Crayola)#95E0E8ΔE 11.04 Sky Blue#87CEEBΔE 12.22 Medium Turquoise#48D1CCΔE 13.76

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

#66D4E5 Channel Values

How #66D4E5 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 102 · G 212 · B 229	8-bit channels as sent to the display
HSL	H 188° · S 71% · L 65%	Easiest model for building lighter and darker variants
HSV	H 188° · S 55% · V 90%	Matches the picker in most design tools
CMYK	C 55% · M 7% · Y 0% · K 10%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.73:1 vs white · 12.11:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66D4E5 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 text1.73:1AA normal AA large AAA normal

TextBlack text12.11:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66D4E5 in the contrast checker.

Colors That Go With #66D4E5

Pairings derived from color-wheel relationships. The complementary color sits opposite #66D4E5; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #66D4E5

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

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66D4E5.

How #66D4E5 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#66D4E5

Protanopia#C7C7E5

Protanomaly#A9CCE5

Deuteranopia#B9B9E7

Deuteranomaly#9EC4E6

Tritanopia#60D6D6

Tritanomaly#62D5DC

Achromatopsia#C5C5C5

Test a full palette in the color blindness simulator.

Using #66D4E5 in Code

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

CSS custom property--color-66d4e5: #66D4E5;

CSS backgroundbackground-color: #66D4E5;

Tailwind configcolors: { 'color-66d4e5': '#66D4E5' }

SwiftUIColor(red: 0.400, green: 0.831, blue: 0.898)

Android XML<color name="color_66d4e5">#66D4E5</color>

SVG fillfill="#66D4E5"

More Teal Colors

#66D4E5 sits in the teal family. These are its neighbours across that family's full range, each with its own breakdown.

002424 f5ffff 002a38 f0ffff 002d2e eefbfb 003333 ecfeff 003542 ecf7f9 003838 ebffff 006466 009999 00ebeb 0d1616 192929 24fbff 36747d 50bfe6 73a9c2 8dd9cc aec6cf ccffff

#66D4E5 Frequently Asked Questions

What color is #66D4E5?

#66D4E5 is a light teal — rgb(102, 212, 229) in RGB and hsl(188, 71%, 65%) in HSL. It carries no registered color name of its own; the closest named color is Sky Blue (Crayola) (#76D7EA), which is very hard to tell apart at a CIE76 distance of 3.61.

What is the RGB value of #66D4E5?

#66D4E5 is rgb(102, 212, 229) — red 102, green 212, and blue 229 on the 0-255 scale.

What is the CMYK value of #66D4E5?

#66D4E5 converts to approximately cmyk(55%, 7%, 0%, 10%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66D4E5 be black or white?

Black text is the more readable choice. #66D4E5 scores 1.73:1 against white and 12.11:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66D4E5 as a CSS color keyword?

No. #66D4E5 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 skyblue (#87CEEB) at a CIE76 distance of 12.22, which is visibly different.

Open #66D4E5 in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

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