#66D3ED#66D3ED

#66D3ED is a light, moderate cyan. Relative luminance 0.555; OKLCH L 81.2% C 0.106 H 215.6°. Best body text is #000000 at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#66D3ED
RGB	rgb(102, 211, 237)
HSL	hsl(192, 79%, 66%)
HSV	hsv(192, 57%, 93%)
CMYK	cmyk(57%, 11%, 0%, 7.1%)
CIE-LAB	lab(79.34, -24.01, -22.27)
CIE-LCH	lch(79.34, 32.74, 222.84°)
OKLab	oklab(81.25% -0.0861 -0.0617)
OKLCH	oklch(81.25% 0.106 215.6)
XYZ	xyz(44.0537, 55.5235, 88.4998)
Luminance	0.5553 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D3ED #ED8066

analogous

#66EDC4 #66D3ED #6690ED

triadic

#66D3ED #ED66D3 #D3ED66

tetradic

#66D3ED #C466ED #ED8066 #90ED66

square

#66D3ED #C466ED #ED8066 #90ED66

split-complementary

#66D3ED #ED6690 #EDC466

monochromatic

#17A1C2 #2FC3E7 #66D3ED #9DE3F3 #D4F2FA

Accessibility & contrast

On white

1.73

#66D3ED on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.11

#66D3ED on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D3ED

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D3ED	#FFFFFF	#000000	##000000
##66D3ED	1.00	1.73	12.11	12.11
#FFFFFF	1.73	1.00	21.00	21.00
#000000	12.11	21.00	1.00	1.00
##000000	12.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C1CDEE

Deuteranopia (green-blind)

#ADBEED

Tritanopia (blue-blind)

#00DDDB

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #66d3ed;
/* rgb */ color: rgb(102, 211, 237);
/* oklch */ color: oklch(81.2% 0.106 215.6);

Tailwind

colors: {
  custom: {
    50: '#9de0f2',
    500: '#66d3ed',
    950: '#000000',
  },
}

SCSS

$custom: #66d3ed;
$custom-light: #9de0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#66d3ed",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 237
  },
  "hsl": {
    "h": 191.556,
    "s": 78.947,
    "l": 66.471
  },
  "oklch": {
    "l": 0.81246,
    "c": 0.10596,
    "h": 215.6
  },
  "luminance": 0.55528
}

Semantic roles & 50–950 ramp

primary

#66D3ED

secondary

#C05237

accent

#330ADB

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D3ED

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →