#66DDF9#66DDF9

#66DDF9 is a very light, moderate cyan. Relative luminance 0.614; OKLCH L 84.0% C 0.113 H 215.6°. Best body text is #000000 at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#66DDF9
RGB	rgb(102, 221, 249)
HSL	hsl(191, 92%, 69%)
HSV	hsv(191, 59%, 98%)
CMYK	cmyk(59%, 11.2%, 0%, 2.4%)
CIE-LAB	lab(82.58, -25.56, -23.73)
CIE-LCH	lch(82.58, 34.87, 222.87°)
OKLab	oklab(83.97% -0.092 -0.0659)
OKLCH	oklch(83.97% 0.113 215.6)
XYZ	xyz(48.4279, 61.3724, 98.8981)
Luminance	0.6138 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66DDF9 #F98266

analogous

#66F9CC #66DDF9 #6694F9

triadic

#66DDF9 #F966DD #DDF966

tetradic

#66DDF9 #CC66F9 #F98266 #94F966

square

#66DDF9 #CC66F9 #F98266 #94F966

split-complementary

#66DDF9 #F96694 #F9CC66

monochromatic

#09B4DC #2BD0F7 #66DDF9 #A1EAFB #DCF7FE

Accessibility & contrast

On white

1.58

#66DDF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.28

#66DDF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66DDF9

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66DDF9	#FFFFFF	#000000	##000000
##66DDF9	1.00	1.58	13.28	13.28
#FFFFFF	1.58	1.00	21.00	21.00
#000000	13.28	21.00	1.00	1.00
##000000	13.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C9D7FB

Deuteranopia (green-blind)

#B4C7F9

Tritanopia (blue-blind)

#00E7E6

Achromatopsia (no color)

#CDCDCD

Design tokens & code

CSS

--color: #66ddf9;
/* rgb */ color: rgb(102, 221, 249);
/* oklch */ color: oklch(84.0% 0.113 215.6);

Tailwind

colors: {
  custom: {
    50: '#9ee7fb',
    500: '#66ddf9',
    950: '#000000',
  },
}

SCSS

$custom: #66ddf9;
$custom-light: #9ee7fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66ddf9",
  "rgb": {
    "r": 102,
    "g": 221,
    "b": 249
  },
  "hsl": {
    "h": 191.429,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.83974,
    "c": 0.11312,
    "h": 215.6
  },
  "luminance": 0.61377
}

Semantic roles & 50–950 ramp

primary

#66DDF9

secondary

#D34F30

accent

#2C00E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101617

muted

#808485

Preview Lab

Preview with #66DDF9

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

Preview Lab → · Contrast checker → · Palette generator →