#66D9F2#66D9F2

#66D9F2 is a very light, moderate cyan. Relative luminance 0.589; OKLCH L 82.8% C 0.109 H 214.1°. Best body text is #000000 at 12.77:1 contrast (WCAG AA passes).

Color values

HEX	#66D9F2
RGB	rgb(102, 217, 242)
HSL	hsl(191, 84%, 67%)
HSV	hsv(191, 58%, 95%)
CMYK	cmyk(57.9%, 10.3%, 0%, 5.1%)
CIE-LAB	lab(81.21, -25.57, -22.09)
CIE-LCH	lch(81.21, 33.79, 220.82°)
OKLab	oklab(82.8% -0.0905 -0.0612)
OKLCH	oklch(82.8% 0.109 214.1)
XYZ	xyz(46.3129, 58.8567, 92.9070)
Luminance	0.5886 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D9F2 #F27F66

analogous

#66F2C5 #66D9F2 #6693F2

triadic

#66D9F2 #F266D9 #D9F266

tetradic

#66D9F2 #C566F2 #F27F66 #93F266

square

#66D9F2 #C566F2 #F27F66 #93F266

split-complementary

#66D9F2 #F26693 #F2C566

monochromatic

#11ABCC #2ECBED #66D9F2 #9EE7F7 #D7F5FC

Accessibility & contrast

On white

1.64

#66D9F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.77

#66D9F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D9F2

12.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D9F2	#FFFFFF	#000000	##000000
##66D9F2	1.00	1.64	12.77	12.77
#FFFFFF	1.64	1.00	21.00	21.00
#000000	12.77	21.00	1.00	1.00
##000000	12.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C7D3F3

Deuteranopia (green-blind)

#B2C3F2

Tritanopia (blue-blind)

#00E3E1

Achromatopsia (no color)

#CACACA

Design tokens & code

CSS

--color: #66d9f2;
/* rgb */ color: rgb(102, 217, 242);
/* oklch */ color: oklch(82.8% 0.109 214.1);

Tailwind

colors: {
  custom: {
    50: '#9de5f6',
    500: '#66d9f2',
    950: '#000000',
  },
}

SCSS

$custom: #66d9f2;
$custom-light: #9de5f6;
$custom-dark: #000000;

JSON

{
  "hex": "#66d9f2",
  "rgb": {
    "r": 102,
    "g": 217,
    "b": 242
  },
  "hsl": {
    "h": 190.714,
    "s": 84.337,
    "l": 67.451
  },
  "oklch": {
    "l": 0.82801,
    "c": 0.10928,
    "h": 214.1
  },
  "luminance": 0.58861
}

Semantic roles & 50–950 ramp

primary

#66D9F2

secondary

#C94E34

accent

#2C05E1

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D9F2

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

Preview Lab → · Contrast checker → · Palette generator →