#66B9EC#66B9EC

#66B9EC is a light, moderate cyan. Relative luminance 0.436; OKLCH L 75.3% C 0.110 H 237.6°. Best body text is #000000 at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#66B9EC
RGB	rgb(102, 185, 236)
HSL	hsl(203, 78%, 66%)
HSV	hsv(203, 57%, 93%)
CMYK	cmyk(56.8%, 21.6%, 0%, 7.5%)
CIE-LAB	lab(71.94, -10.84, -33.07)
CIE-LCH	lch(71.94, 34.80, 251.84°)
OKLab	oklab(75.33% -0.0587 -0.0924)
OKLCH	oklch(75.33% 0.11 237.6)
XYZ	xyz(37.9631, 43.5754, 85.7509)
Luminance	0.4358 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B9EC #EC9966

analogous

#66ECDC #66B9EC #6676EC

triadic

#66B9EC #EC66B9 #B9EC66

tetradic

#66B9EC #DC66EC #EC9966 #76EC66

square

#66B9EC #DC66EC #EC9966 #76EC66

split-complementary

#66B9EC #EC6676 #ECDC66

monochromatic

#1880C0 #30A0E5 #66B9EC #9CD2F3 #D3EBFA

Accessibility & contrast

On white

2.16

#66B9EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.72

#66B9EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B9EC

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B9EC	#FFFFFF	#000000	##000000
##66B9EC	1.00	2.16	9.72	9.72
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.72	21.00	1.00	1.00
##000000	9.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2B8EE

Deuteranopia (green-blind)

#8FAAEB

Tritanopia (blue-blind)

#00C6CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66b9ec;
/* rgb */ color: rgb(102, 185, 236);
/* oklch */ color: oklch(75.3% 0.110 237.6);

Tailwind

colors: {
  custom: {
    50: '#9bcef2',
    500: '#66b9ec',
    950: '#000000',
  },
}

SCSS

$custom: #66b9ec;
$custom-light: #9bcef2;
$custom-dark: #000000;

JSON

{
  "hex": "#66b9ec",
  "rgb": {
    "r": 102,
    "g": 185,
    "b": 236
  },
  "hsl": {
    "h": 202.836,
    "s": 77.907,
    "l": 66.275
  },
  "oklch": {
    "l": 0.75335,
    "c": 0.1095,
    "h": 237.6
  },
  "luminance": 0.43579
}

Semantic roles & 50–950 ramp

primary

#66B9EC

secondary

#EDD2C1

accent

#5A0BDA

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B9EC

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

Preview Lab → · Contrast checker → · Palette generator →