#66ADD4#66ADD4

#66ADD4 is a light, moderate cyan. Relative luminance 0.375; OKLCH L 71.6% C 0.091 H 234.1°. Best body text is #000000 at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#66ADD4
RGB	rgb(102, 173, 212)
HSL	hsl(201, 56%, 62%)
HSV	hsv(201, 52%, 83%)
CMYK	cmyk(51.9%, 18.4%, 0%, 16.9%)
CIE-LAB	lab(67.62, -11.52, -26.61)
CIE-LCH	lch(67.62, 29.00, 246.60°)
OKLab	oklab(71.6% -0.0536 -0.074)
OKLCH	oklch(71.6% 0.091 234.1)
XYZ	xyz(32.3024, 37.4627, 67.8034)
Luminance	0.3746 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADD4 #D48D66

analogous

#66D4C4 #66ADD4 #6676D4

triadic

#66ADD4 #D466AD #ADD466

tetradic

#66ADD4 #C466D4 #D48D66 #76D466

square

#66ADD4 #C466D4 #D48D66 #76D466

split-complementary

#66ADD4 #D46676 #D4C466

monochromatic

#2A6F96 #3793C5 #66ADD4 #96C7E1 #C6E0EF

Accessibility & contrast

On white

2.47

#66ADD4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.49

#66ADD4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADD4

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADD4	#FFFFFF	#000000	##000000
##66ADD4	1.00	2.47	8.49	8.49
#FFFFFF	2.47	1.00	21.00	21.00
#000000	8.49	21.00	1.00	1.00
##000000	8.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AABD6

Deuteranopia (green-blind)

#8BA0D3

Tritanopia (blue-blind)

#23B7BA

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #66add4;
/* rgb */ color: rgb(102, 173, 212);
/* oklch */ color: oklch(71.6% 0.091 234.1);

Tailwind

colors: {
  custom: {
    50: '#99c5e1',
    500: '#66add4',
    950: '#000000',
  },
}

SCSS

$custom: #66add4;
$custom-light: #99c5e1;
$custom-dark: #000000;

JSON

{
  "hex": "#66add4",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 212
  },
  "hsl": {
    "h": 201.273,
    "s": 56.122,
    "l": 61.569
  },
  "oklch": {
    "l": 0.71603,
    "c": 0.09141,
    "h": 234.1
  },
  "luminance": 0.37465
}

Semantic roles & 50–950 ramp

primary

#66ADD4

secondary

#DFC5B6

accent

#5B22C4

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0E1215

muted

#7E8183

Preview Lab

Preview with #66ADD4

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

Preview Lab → · Contrast checker → · Palette generator →