#66B4ED#66B4ED

#66B4ED is a light, moderate cyan. Relative luminance 0.416; OKLCH L 74.3% C 0.113 H 242.1°. Best body text is #000000 at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#66B4ED
RGB	rgb(102, 180, 237)
HSL	hsl(205, 79%, 66%)
HSV	hsv(205, 57%, 93%)
CMYK	cmyk(57%, 24.1%, 0%, 7.1%)
CIE-LAB	lab(70.58, -7.84, -35.73)
CIE-LCH	lch(70.58, 36.57, 257.63°)
OKLab	oklab(74.27% -0.0529 -0.1001)
OKLCH	oklch(74.27% 0.113 242.1)
XYZ	xyz(37.0812, 41.5784, 86.1757)
Luminance	0.4158 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4ED #ED9F66

analogous

#66EDE2 #66B4ED #6671ED

triadic

#66B4ED #ED66B4 #B4ED66

tetradic

#66B4ED #E266ED #ED9F66 #71ED66

square

#66B4ED #E266ED #ED9F66 #71ED66

split-complementary

#66B4ED #ED6671 #EDE266

monochromatic

#177AC2 #2F99E7 #66B4ED #9DCFF3 #D4EAFA

Accessibility & contrast

On white

2.25

#66B4ED on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.32

#66B4ED on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4ED

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4ED	#FFFFFF	#000000	##000000
##66B4ED	1.00	2.25	9.32	9.32
#FFFFFF	2.25	1.00	21.00	21.00
#000000	9.32	21.00	1.00	1.00
##000000	9.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB4F0

Deuteranopia (green-blind)

#89A7EC

Tritanopia (blue-blind)

#00C2C7

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b4ed;
/* rgb */ color: rgb(102, 180, 237);
/* oklch */ color: oklch(74.3% 0.113 242.1);

Tailwind

colors: {
  custom: {
    50: '#9bcaf3',
    500: '#66b4ed',
    950: '#000000',
  },
}

SCSS

$custom: #66b4ed;
$custom-light: #9bcaf3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4ed",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 237
  },
  "hsl": {
    "h": 205.333,
    "s": 78.947,
    "l": 66.471
  },
  "oklch": {
    "l": 0.74268,
    "c": 0.11324,
    "h": 242.1
  },
  "luminance": 0.41582
}

Semantic roles & 50–950 ramp

primary

#66B4ED

secondary

#EDD4C2

accent

#620ADB

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B4ED

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

Preview Lab → · Contrast checker → · Palette generator →