#66B7ED#66B7ED

#66B7ED is a light, moderate cyan. Relative luminance 0.428; OKLCH L 74.9% C 0.112 H 239.7°. Best body text is #000000 at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#66B7ED
RGB	rgb(102, 183, 237)
HSL	hsl(204, 79%, 66%)
HSV	hsv(204, 57%, 93%)
CMYK	cmyk(57%, 22.8%, 0%, 7.1%)
CIE-LAB	lab(71.42, -9.47, -34.42)
CIE-LCH	lch(71.42, 35.70, 254.62°)
OKLab	oklab(74.93% -0.0562 -0.0963)
OKLCH	oklch(74.93% 0.112 239.7)
XYZ	xyz(37.6934, 42.8028, 86.3797)
Luminance	0.4281 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B7ED #ED9C66

analogous

#66EDE0 #66B7ED #6674ED

triadic

#66B7ED #ED66B7 #B7ED66

tetradic

#66B7ED #E066ED #ED9C66 #74ED66

square

#66B7ED #E066ED #ED9C66 #74ED66

split-complementary

#66B7ED #ED6674 #EDE066

monochromatic

#177DC2 #2F9DE7 #66B7ED #9DD1F3 #D4EBFA

Accessibility & contrast

On white

2.20

#66B7ED on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.56

#66B7ED on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B7ED

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B7ED	#FFFFFF	#000000	##000000
##66B7ED	1.00	2.20	9.56	9.56
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.56	21.00	1.00	1.00
##000000	9.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB7F0

Deuteranopia (green-blind)

#8CA9EC

Tritanopia (blue-blind)

#00C5C9

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #66b7ed;
/* rgb */ color: rgb(102, 183, 237);
/* oklch */ color: oklch(74.9% 0.112 239.7);

Tailwind

colors: {
  custom: {
    50: '#9bccf3',
    500: '#66b7ed',
    950: '#000000',
  },
}

SCSS

$custom: #66b7ed;
$custom-light: #9bccf3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b7ed",
  "rgb": {
    "r": 102,
    "g": 183,
    "b": 237
  },
  "hsl": {
    "h": 204,
    "s": 78.947,
    "l": 66.471
  },
  "oklch": {
    "l": 0.74934,
    "c": 0.11153,
    "h": 239.7
  },
  "luminance": 0.42806
}

Semantic roles & 50–950 ramp

primary

#66B7ED

secondary

#EDD3C2

accent

#5E0ADB

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B7ED

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

Preview Lab → · Contrast checker → · Palette generator →