#66B8EE#66B8EE

#66B8EE is a light, moderate cyan. Relative luminance 0.433; OKLCH L 75.2% C 0.112 H 239.4°. Best body text is #000000 at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#66B8EE
RGB	rgb(102, 184, 238)
HSL	hsl(204, 80%, 67%)
HSV	hsv(204, 57%, 93%)
CMYK	cmyk(57.1%, 22.7%, 0%, 6.7%)
CIE-LAB	lab(71.74, -9.70, -34.47)
CIE-LCH	lch(71.74, 35.81, 254.28°)
OKLab	oklab(75.2% -0.0569 -0.0965)
OKLCH	oklch(75.2% 0.112 239.4)
XYZ	xyz(38.0469, 43.2753, 87.2203)
Luminance	0.4328 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B8EE #EE9C66

analogous

#66EEE0 #66B8EE #6674EE

triadic

#66B8EE #EE66B8 #B8EE66

tetradic

#66B8EE #E066EE #EE9C66 #74EE66

square

#66B8EE #E066EE #EE9C66 #74EE66

split-complementary

#66B8EE #EE6674 #EEE066

monochromatic

#167FC4 #2F9EE8 #66B8EE #9DD2F4 #D4EBFA

Accessibility & contrast

On white

2.17

#66B8EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.66

#66B8EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B8EE

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B8EE	#FFFFFF	#000000	##000000
##66B8EE	1.00	2.17	9.66	9.66
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.66	21.00	1.00	1.00
##000000	9.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B8F1

Deuteranopia (green-blind)

#8DAAED

Tritanopia (blue-blind)

#00C6CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66b8ee;
/* rgb */ color: rgb(102, 184, 238);
/* oklch */ color: oklch(75.2% 0.112 239.4);

Tailwind

colors: {
  custom: {
    50: '#9bcdf3',
    500: '#66b8ee',
    950: '#000000',
  },
}

SCSS

$custom: #66b8ee;
$custom-light: #9bcdf3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b8ee",
  "rgb": {
    "r": 102,
    "g": 184,
    "b": 238
  },
  "hsl": {
    "h": 203.824,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.75201,
    "c": 0.11202,
    "h": 239.4
  },
  "luminance": 0.43279
}

Semantic roles & 50–950 ramp

primary

#66B8EE

secondary

#EED3C2

accent

#5D09DC

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B8EE

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

Preview Lab → · Contrast checker → · Palette generator →