#66ADEE#66ADEE

#66ADEE is a light, moderate cyan. Relative luminance 0.389; OKLCH L 72.8% C 0.119 H 247.8°. Best body text is #000000 at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#66ADEE
RGB	rgb(102, 173, 238)
HSL	hsl(209, 80%, 67%)
HSV	hsv(209, 57%, 93%)
CMYK	cmyk(57.1%, 27.3%, 0%, 6.7%)
CIE-LAB	lab(68.67, -3.68, -39.25)
CIE-LCH	lch(68.67, 39.42, 264.65°)
OKLab	oklab(72.77% -0.0451 -0.1103)
OKLCH	oklch(72.77% 0.119 247.8)
XYZ	xyz(35.8501, 38.8818, 86.4880)
Luminance	0.3888 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADEE #EEA766

analogous

#66EEEB #66ADEE #6669EE

triadic

#66ADEE #EE66AD #ADEE66

tetradic

#66ADEE #EB66EE #EEA766 #69EE66

square

#66ADEE #EB66EE #EEA766 #69EE66

split-complementary

#66ADEE #EE6669 #EEEB66

monochromatic

#1671C4 #2F8FE8 #66ADEE #9DCBF4 #D4E8FA

Accessibility & contrast

On white

2.39

#66ADEE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.78

#66ADEE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADEE

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADEE	#FFFFFF	#000000	##000000
##66ADEE	1.00	2.39	8.78	8.78
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.78	21.00	1.00	1.00
##000000	8.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91AFF1

Deuteranopia (green-blind)

#7FA1ED

Tritanopia (blue-blind)

#00BCC4

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66adee;
/* rgb */ color: rgb(102, 173, 238);
/* oklch */ color: oklch(72.8% 0.119 247.8);

Tailwind

colors: {
  custom: {
    50: '#9bc5f4',
    500: '#66adee',
    950: '#000000',
  },
}

SCSS

$custom: #66adee;
$custom-light: #9bc5f4;
$custom-dark: #000000;

JSON

{
  "hex": "#66adee",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 238
  },
  "hsl": {
    "h": 208.676,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.72771,
    "c": 0.11916,
    "h": 247.8
  },
  "luminance": 0.38885
}

Semantic roles & 50–950 ramp

primary

#66ADEE

secondary

#EED7C2

accent

#6E09DC

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ADEE

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

Preview Lab → · Contrast checker → · Palette generator →