#66D9FC#66D9FC

#66D9FC is a very light, moderate cyan. Relative luminance 0.595; OKLCH L 83.2% C 0.115 H 220.8°. Best body text is #000000 at 12.90:1 contrast (WCAG AA passes).

Color values

HEX	#66D9FC
RGB	rgb(102, 217, 252)
HSL	hsl(194, 96%, 69%)
HSV	hsv(194, 60%, 99%)
CMYK	cmyk(59.5%, 13.9%, 0%, 1.2%)
CIE-LAB	lab(81.55, -22.71, -26.88)
CIE-LCH	lch(81.55, 35.19, 229.81°)
OKLab	oklab(83.19% -0.0867 -0.0748)
OKLCH	oklch(83.19% 0.115 220.8)
XYZ	xyz(47.8560, 59.4740, 101.0342)
Luminance	0.5948 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D9FC #FC8966

analogous

#66FCD4 #66D9FC #668EFC

triadic

#66D9FC #FC66D9 #D9FC66

tetradic

#66D9FC #D466FC #FC8966 #8EFC66

square

#66D9FC #D466FC #FC8966 #8EFC66

split-complementary

#66D9FC #FC668E #FCD466

monochromatic

#04AFE3 #2ACAFB #66D9FC #A2E8FD #DEF7FE

Accessibility & contrast

On white

1.63

#66D9FC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.90

#66D9FC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D9FC

12.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D9FC	#FFFFFF	#000000	##000000
##66D9FC	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)

#C4D4FE

Deuteranopia (green-blind)

#AEC4FC

Tritanopia (blue-blind)

#00E4E4

Achromatopsia (no color)

#CBCBCB

Design tokens & code

CSS

--color: #66d9fc;
/* rgb */ color: rgb(102, 217, 252);
/* oklch */ color: oklch(83.2% 0.115 220.8);

Tailwind

colors: {
  custom: {
    50: '#9ee5fd',
    500: '#66d9fc',
    950: '#000000',
  },
}

SCSS

$custom: #66d9fc;
$custom-light: #9ee5fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66d9fc",
  "rgb": {
    "r": 102,
    "g": 217,
    "b": 252
  },
  "hsl": {
    "h": 194,
    "s": 96.154,
    "l": 69.412
  },
  "oklch": {
    "l": 0.83185,
    "c": 0.11451,
    "h": 220.8
  },
  "luminance": 0.59479
}

Semantic roles & 50–950 ramp

primary

#66D9FC

secondary

#D65730

accent

#3600E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D9FC

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

Preview Lab → · Contrast checker → · Palette generator →