#66DEF9#66DEF9

#66DEF9 is a very light, moderate cyan. Relative luminance 0.619; OKLCH L 84.2% C 0.113 H 214.8°. Best body text is #000000 at 13.38:1 contrast (WCAG AA passes).

Color values

HEX	#66DEF9
RGB	rgb(102, 222, 249)
HSL	hsl(191, 92%, 69%)
HSV	hsv(191, 59%, 98%)
CMYK	cmyk(59%, 10.8%, 0%, 2.4%)
CIE-LAB	lab(82.86, -26.05, -23.30)
CIE-LCH	lch(82.86, 34.95, 221.81°)
OKLab	oklab(84.2% -0.093 -0.0646)
OKLCH	oklch(84.2% 0.113 214.8)
XYZ	xyz(48.6927, 61.9020, 98.9863)
Luminance	0.6191 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66DEF9 #F98166

analogous

#66F9CA #66DEF9 #6695F9

triadic

#66DEF9 #F966DE #DEF966

tetradic

#66DEF9 #CA66F9 #F98166 #95F966

square

#66DEF9 #CA66F9 #F98166 #95F966

split-complementary

#66DEF9 #F96695 #F9CA66

monochromatic

#09B5DC #2BD1F7 #66DEF9 #A1EBFB #DCF7FE

Accessibility & contrast

On white

1.57

#66DEF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.38

#66DEF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66DEF9

13.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66DEF9	#FFFFFF	#000000	##000000
##66DEF9	1.00	1.57	13.38	13.38
#FFFFFF	1.57	1.00	21.00	21.00
#000000	13.38	21.00	1.00	1.00
##000000	13.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CBD8FB

Deuteranopia (green-blind)

#B5C7F9

Tritanopia (blue-blind)

#00E8E6

Achromatopsia (no color)

#CECECE

Design tokens & code

CSS

--color: #66def9;
/* rgb */ color: rgb(102, 222, 249);
/* oklch */ color: oklch(84.2% 0.113 214.8);

Tailwind

colors: {
  custom: {
    50: '#9ee8fb',
    500: '#66def9',
    950: '#000000',
  },
}

SCSS

$custom: #66def9;
$custom-light: #9ee8fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66def9",
  "rgb": {
    "r": 102,
    "g": 222,
    "b": 249
  },
  "hsl": {
    "h": 191.02,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.84201,
    "c": 0.11327,
    "h": 214.8
  },
  "luminance": 0.61907
}

Semantic roles & 50–950 ramp

primary

#66DEF9

secondary

#D34E30

accent

#2A00E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101617

muted

#808485

Preview Lab

Preview with #66DEF9

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

Preview Lab → · Contrast checker → · Palette generator →