#66ADF9#66ADF9

#66ADF9 is a light, vivid cyan. Relative luminance 0.396; OKLCH L 73.3% C 0.132 H 251.5°. Best body text is #000000 at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#66ADF9
RGB	rgb(102, 173, 249)
HSL	hsl(211, 92%, 69%)
HSV	hsv(211, 59%, 98%)
CMYK	cmyk(59%, 30.5%, 0%, 2.4%)
CIE-LAB	lab(69.15, -0.24, -44.48)
CIE-LCH	lch(69.15, 44.48, 269.69°)
OKLab	oklab(73.31% -0.0419 -0.1255)
OKLCH	oklch(73.31% 0.132 251.5)
XYZ	xyz(37.5158, 39.5481, 95.2607)
Luminance	0.3955 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADF9 #F9B266

analogous

#66F7F9 #66ADF9 #6966F9

triadic

#66ADF9 #F966AD #ADF966

tetradic

#66ADF9 #F966F7 #F9B266 #66F969

square

#66ADF9 #F966F7 #F9B266 #66F969

split-complementary

#66ADF9 #F96966 #F7F966

monochromatic

#096FDC #2B8DF7 #66ADF9 #A1CDFB #DCECFE

Accessibility & contrast

On white

2.36

#66ADF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.91

#66ADF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADF9

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADF9	#FFFFFF	#000000	##000000
##66ADF9	1.00	2.36	8.91	8.91
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.91	21.00	1.00	1.00
##000000	8.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DB1FC

Deuteranopia (green-blind)

#79A2F7

Tritanopia (blue-blind)

#00BFC8

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #66adf9;
/* rgb */ color: rgb(102, 173, 249);
/* oklch */ color: oklch(73.3% 0.132 251.5);

Tailwind

colors: {
  custom: {
    50: '#9dc5fb',
    500: '#66adf9',
    950: '#000000',
  },
}

SCSS

$custom: #66adf9;
$custom-light: #9dc5fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66adf9",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 249
  },
  "hsl": {
    "h": 211.02,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.73308,
    "c": 0.13229,
    "h": 251.5
  },
  "luminance": 0.39551
}

Semantic roles & 50–950 ramp

primary

#66ADF9

secondary

#F3DEC8

accent

#7700E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ADF9

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

Preview Lab → · Contrast checker → · Palette generator →