#66DBE5

Accessibility

AAA

12.83:1

Vs white / black

1.64:1 · 12.83:1

Sources

Library color

Codes

Formats

HEX

#66dbe5

RGB

rgb(102, 219, 229)

RGBA

rgba(102, 219, 229, 1)

HSL

hsl(185, 71%, 65%)

HSLA

hsla(185, 71%, 65%, 1)

HSV

hsv(185, 55%, 90%)

LAB

lab(81.37% -30.15 -14.94)

LCH

lch(81.37% 33.65 206.36)

OKLAB

oklab(0.8279 -0.0977 -0.0413)

OKLCH

oklch(0.8279 0.1061 202.91)

XYZ

xyz(44.95, 59.14, 83.16)

CMYK

cmyk(55%, 4%, 0%, 10%)

CSS

color: #66dbe5;

CSS variable

--color-66dbe5: #66dbe5;

SCSS

$color-66dbe5: #66dbe5;

JavaScript

const color = "#66dbe5";

TypeScript

const color: string = "#66dbe5";

React

style={{ backgroundColor: "#66dbe5" }}

JSON

{ "hex": "#66dbe5", "rgb": { "r": 102, "g": 219, "b": 229 }, "oklch": "oklch(0.8279 0.1061 202.91)" }

Export

Developer code

css

:root {
  --#66dbe5-1: #66dbe5;
}

Design systems

Nearest official tokens

An arbitrary HEX is not an official Tailwind, Material, or Bootstrap color. Distance is CIEDE2000.

Nearest Tailwind color

cyan-300

Noticeably different · ΔE 3.64 · #67E8F9

Nearest CSS named color

DarkTurquoise

Very different · ΔE 6.21 · #00CED1

Nearest Material color

cyan-200

Noticeably different · ΔE 2.85 · #80DEEA

Nearest Bootstrap color

info

Very different · ΔE 9.26 · #0DCAF0

OKLCH

Perceptual 50–950 scale

Generated in OKLCH from this hex. Not an official Tailwind scale unless the hex itself is a Tailwind token.

50c2ffff 100b0f6fd 20091e5ec 3006cd0d8 40039b5bf 5000098a2 600008088 70000676e 800004e54 90000373c 950002125

Palette

Tints & shades

Full scale from light tints through the base color into deep shades

f2fcfd e6f9fb d9f6f9 ccf3f6 bff0f4 b3edf2 a6eaf0 99e7ee 8ce4ec 80e1e9 73dee7 66dbe5 5ec9d2 55b7bf 4da4ac 449299 3b8086 336e73 2a5b5f 22494c 1a3739 112426 091213

Palette

Tints

Mixed toward white — soft backgrounds and highlights

f2fcfd e6f9fb d9f6f9 ccf3f6 bff0f4 b3edf2 a6eaf0 99e7ee 8ce4ec 80e1e9 73dee7

Palette

Shades

Mixed toward black — depth, text, and emphasis

5ec9d2 55b7bf 4da4ac 449299 3b8086 336e73 2a5b5f 22494c 1a3739 112426 091213

Palette

Tones

Mixed toward neutral grey — muted UI surfaces

68d3dd 6accd4 6dc4cc 6fbdc3 71b5bb 73aeb3 75a6aa 779ea2 7a9799 7c8f91 7e8888

Harmony

Complementary

Opposite on the color wheel for contrast

#66DBE5Stop 1 #E57166Stop 2

Harmony

Analogous

Neighbors that sit comfortably together

#66E5B0Stop 1 #66DBE5Stop 2 #669BE5Stop 3

Harmony

Triadic

Evenly spaced triad for vibrant sets

#66DBE5Stop 1 #E566DBStop 2 #DBE566Stop 3

Harmony

Split complementary

Base plus two accents beside the complement

#66DBE5Stop 1 #E5669BStop 2 #E5B066Stop 3

Harmony

Monochromatic

Same hue, varied lightness and saturation

#0F5157Stop 1 #1A8E99Stop 2 #25CBDAStop 3 #66DBE5Stop 4 #A8EAF0Stop 5

Using this color

Where #66dbe5 works

#66DBE5 (#66dbe5) sits in the cyan family at about 185° hue, 71% saturation, and 65% lightness. Contrast is 1.64:1 on white and 12.83:1 on black, so near-black labels read more clearly on the swatch itself. Nearest Tailwind token: cyan-300 (approximation unless the hex is an official scale stop).

Sensible jobs for this swatch

supporting UI accents
text or icons on charcoal / dark mode

Do not use #66dbe5 as small body text on white — 1.64:1 misses WCAG AA (4.5:1). Pair it with a darker shade from the scale below, or check pairs in the contrast checker.

Family context: Freshness, clarity, and innovation. Great for tech accents and clean digital products. Common uses still include buttons, charts, and accents in the Cyan range — always verify the pair for this exact hex in the contrast checker.

Similar & related colors

Nearby colors from the library by perceptual distance

Spectrum #5ED8E4#5ED8E4 Spectrum #7FE0EB#7FE0EB Material Cyan 200#80DEEA Spectrum #5CE3F5#5CE3F5 Spectrum #38DEF0#38DEF0 Spectrum #80D5DB#80D5DB Spectrum #3DD1DB#3DD1DB Material Cyan 300#4DD0E1 Tailwind cyan 300#67E8F9 Spectrum #14D9EB#14D9EB Spectrum #66CCD1#66CCD1 Spectrum #80E0DF#80E0DF