#66DAF4#66DAF4

#66DAF4 is a very light, moderate cyan. Relative luminance 0.595; OKLCH L 83.1% C 0.110 H 214.7°. Best body text is #000000 at 12.90:1 contrast (WCAG AA passes).

Color values

HEX	#66DAF4
RGB	rgb(102, 218, 244)
HSL	hsl(191, 87%, 68%)
HSV	hsv(191, 58%, 96%)
CMYK	cmyk(58.2%, 10.7%, 0%, 4.3%)
CIE-LAB	lab(81.56, -25.50, -22.62)
CIE-LCH	lch(81.56, 34.08, 221.58°)
OKLab	oklab(83.1% -0.0908 -0.0627)
OKLCH	oklch(83.1% 0.11 214.7)
XYZ	xyz(46.8734, 59.4946, 94.5838)
Luminance	0.5950 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66DAF4 #F48066

analogous

#66F4C7 #66DAF4 #6693F4

triadic

#66DAF4 #F466DA #DAF466

tetradic

#66DAF4 #C766F4 #F48066 #93F466

square

#66DAF4 #C766F4 #F48066 #93F466

split-complementary

#66DAF4 #F46693 #F4C766

monochromatic

#0FADD1 #2DCCF0 #66DAF4 #9FE8F8 #D8F6FC

Accessibility & contrast

On white

1.63

#66DAF4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.90

#66DAF4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66DAF4

12.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66DAF4	#FFFFFF	#000000	##000000
##66DAF4	1.00	1.63	12.90	12.90
#FFFFFF	1.63	1.00	21.00	21.00
#000000	12.90	21.00	1.00	1.00
##000000	12.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C7D4F6

Deuteranopia (green-blind)

#B2C4F4

Tritanopia (blue-blind)

#00E4E2

Achromatopsia (no color)

#CBCBCB

Design tokens & code

CSS

--color: #66daf4;
/* rgb */ color: rgb(102, 218, 244);
/* oklch */ color: oklch(83.1% 0.110 214.7);

Tailwind

colors: {
  custom: {
    50: '#9ee5f7',
    500: '#66daf4',
    950: '#000000',
  },
}

SCSS

$custom: #66daf4;
$custom-light: #9ee5f7;
$custom-dark: #000000;

JSON

{
  "hex": "#66daf4",
  "rgb": {
    "r": 102,
    "g": 218,
    "b": 244
  },
  "hsl": {
    "h": 190.986,
    "s": 86.585,
    "l": 67.843
  },
  "oklch": {
    "l": 0.83104,
    "c": 0.11034,
    "h": 214.7
  },
  "luminance": 0.59499
}

Semantic roles & 50–950 ramp

primary

#66DAF4

secondary

#CC4E32

accent

#2C02E3

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#101617

muted

#808485

Preview Lab

Preview with #66DAF4

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

Preview Lab → · Contrast checker → · Palette generator →