#66B2EB#66B2EB

#66B2EB is a light, moderate cyan. Relative luminance 0.407; OKLCH L 73.7% C 0.112 H 242.7°. Best body text is #000000 at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#66B2EB
RGB	rgb(102, 178, 235)
HSL	hsl(206, 77%, 66%)
HSV	hsv(206, 57%, 92%)
CMYK	cmyk(56.6%, 24.3%, 0%, 7.8%)
CIE-LAB	lab(69.94, -7.36, -35.63)
CIE-LCH	lch(69.94, 36.38, 258.34°)
OKLab	oklab(73.73% -0.0514 -0.0998)
OKLCH	oklch(73.73% 0.112 242.7)
XYZ	xyz(36.3898, 40.6605, 84.5117)
Luminance	0.4066 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B2EB #EB9F66

analogous

#66EBE1 #66B2EB #666FEB

triadic

#66B2EB #EB66B2 #B2EB66

tetradic

#66B2EB #E166EB #EB9F66 #6FEB66

square

#66B2EB #E166EB #EB9F66 #6FEB66

split-complementary

#66B2EB #EB666F #EBE166

monochromatic

#1977BE #3097E4 #66B2EB #9CCDF2 #D2E8F9

Accessibility & contrast

On white

2.30

#66B2EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.13

#66B2EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B2EB

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B2EB	#FFFFFF	#000000	##000000
##66B2EB	1.00	2.30	9.13	9.13
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.13	21.00	1.00	1.00
##000000	9.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99B2EE

Deuteranopia (green-blind)

#87A5EA

Tritanopia (blue-blind)

#00C0C5

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66b2eb;
/* rgb */ color: rgb(102, 178, 235);
/* oklch */ color: oklch(73.7% 0.112 242.7);

Tailwind

colors: {
  custom: {
    50: '#9bc8f1',
    500: '#66b2eb',
    950: '#000000',
  },
}

SCSS

$custom: #66b2eb;
$custom-light: #9bc8f1;
$custom-dark: #000000;

JSON

{
  "hex": "#66b2eb",
  "rgb": {
    "r": 102,
    "g": 178,
    "b": 235
  },
  "hsl": {
    "h": 205.714,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.73734,
    "c": 0.11232,
    "h": 242.7
  },
  "luminance": 0.40664
}

Semantic roles & 50–950 ramp

primary

#66B2EB

secondary

#ECD3C1

accent

#640CD9

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B2EB

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

Preview Lab → · Contrast checker → · Palette generator →