#66B8EA#66B8EA

#66B8EA is a light, moderate cyan. Relative luminance 0.430; OKLCH L 75.0% C 0.108 H 237.4°. Best body text is #000000 at 9.61:1 contrast (WCAG AA passes).

Color values

HEX	#66B8EA
RGB	rgb(102, 184, 234)
HSL	hsl(203, 76%, 66%)
HSV	hsv(203, 56%, 92%)
CMYK	cmyk(56.4%, 21.4%, 0%, 8.2%)
CIE-LAB	lab(71.58, -10.91, -32.54)
CIE-LCH	lch(71.58, 34.32, 251.46°)
OKLab	oklab(75.02% -0.0583 -0.0909)
OKLCH	oklch(75.02% 0.108 237.4)
XYZ	xyz(37.4657, 43.0429, 84.1597)
Luminance	0.4305 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B8EA #EA9866

analogous

#66EADA #66B8EA #6676EA

triadic

#66B8EA #EA66B8 #B8EA66

tetradic

#66B8EA #DA66EA #EA9866 #76EA66

square

#66B8EA #DA66EA #EA9866 #76EA66

split-complementary

#66B8EA #EA6676 #EADA66

monochromatic

#1A7EBC #309FE3 #66B8EA #9CD1F1 #D2EAF9

Accessibility & contrast

On white

2.19

#66B8EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.61

#66B8EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B8EA

9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B8EA	#FFFFFF	#000000	##000000
##66B8EA	1.00	2.19	9.61	9.61
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.61	21.00	1.00	1.00
##000000	9.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1B7EC

Deuteranopia (green-blind)

#8FA9E9

Tritanopia (blue-blind)

#00C5C9

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #66b8ea;
/* rgb */ color: rgb(102, 184, 234);
/* oklch */ color: oklch(75.0% 0.108 237.4);

Tailwind

colors: {
  custom: {
    50: '#9bcdf1',
    500: '#66b8ea',
    950: '#000000',
  },
}

SCSS

$custom: #66b8ea;
$custom-light: #9bcdf1;
$custom-dark: #000000;

JSON

{
  "hex": "#66b8ea",
  "rgb": {
    "r": 102,
    "g": 184,
    "b": 234
  },
  "hsl": {
    "h": 202.727,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.75024,
    "c": 0.10801,
    "h": 237.4
  },
  "luminance": 0.43046
}

Semantic roles & 50–950 ramp

primary

#66B8EA

secondary

#ECD1C0

accent

#5A0DD8

background

#FAFCFE

surface

#F3F9FD

border

#CDD2D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B8EA

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

Preview Lab → · Contrast checker → · Palette generator →