#66ADFD#66ADFD

#66ADFD is a light, vivid cyan. Relative luminance 0.398; OKLCH L 73.5% C 0.137 H 252.7°. Best body text is #000000 at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#66ADFD
RGB	rgb(102, 173, 253)
HSL	hsl(212, 97%, 70%)
HSV	hsv(212, 60%, 99%)
CMYK	cmyk(59.7%, 31.6%, 0%, 0.8%)
CIE-LAB	lab(69.33, 1.03, -46.37)
CIE-LCH	lch(69.33, 46.38, 271.27°)
OKLab	oklab(73.51% -0.0408 -0.1309)
OKLCH	oklch(73.51% 0.137 252.7)
XYZ	xyz(38.1463, 39.8003, 98.5814)
Luminance	0.3980 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADFD #FDB666

analogous

#66F8FD #66ADFD #6B66FD

triadic

#66ADFD #FD66AD #ADFD66

tetradic

#66ADFD #FD66F8 #FDB666 #66FD6B

square

#66ADFD #FD66F8 #FDB666 #66FD6B

split-complementary

#66ADFD #FD6B66 #F8FD66

monochromatic

#036EE6 #2A8DFC #66ADFD #A2CDFE #DFEEFF

Accessibility & contrast

On white

2.34

#66ADFD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.96

#66ADFD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADFD

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADFD	#FFFFFF	#000000	##000000
##66ADFD	1.00	2.34	8.96	8.96
#FFFFFF	2.34	1.00	21.00	21.00
#000000	8.96	21.00	1.00	1.00
##000000	8.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BB1FF

Deuteranopia (green-blind)

#77A3FB

Tritanopia (blue-blind)

#00BFCA

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #66adfd;
/* rgb */ color: rgb(102, 173, 253);
/* oklch */ color: oklch(73.5% 0.137 252.7);

Tailwind

colors: {
  custom: {
    50: '#9dc5fe',
    500: '#66adfd',
    950: '#000000',
  },
}

SCSS

$custom: #66adfd;
$custom-light: #9dc5fe;
$custom-dark: #000000;

JSON

{
  "hex": "#66adfd",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 253
  },
  "hsl": {
    "h": 211.788,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.73508,
    "c": 0.13717,
    "h": 252.7
  },
  "luminance": 0.39804
}

Semantic roles & 50–950 ramp

primary

#66ADFD

secondary

#F5E1CA

accent

#7A00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1218

muted

#7F8186

Preview Lab

Preview with #66ADFD

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

Preview Lab → · Contrast checker → · Palette generator →