#66ADD9#66ADD9

#66ADD9 is a light, moderate cyan. Relative luminance 0.377; OKLCH L 71.8% C 0.096 H 237.4°. Best body text is #000000 at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#66ADD9
RGB	rgb(102, 173, 217)
HSL	hsl(203, 60%, 63%)
HSV	hsv(203, 53%, 85%)
CMYK	cmyk(53%, 20.3%, 0%, 14.9%)
CIE-LAB	lab(67.81, -10.04, -29.07)
CIE-LCH	lch(67.81, 30.76, 250.94°)
OKLab	oklab(71.82% -0.0519 -0.081)
OKLCH	oklch(71.82% 0.096 237.4)
XYZ	xyz(32.9429, 37.7189, 71.1767)
Luminance	0.3772 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADD9 #D99266

analogous

#66D9CC #66ADD9 #6673D9

triadic

#66ADD9 #D966AD #ADD966

tetradic

#66ADD9 #CC66D9 #D99266 #73D966

square

#66ADD9 #CC66D9 #D99266 #73D966

split-complementary

#66ADD9 #D96673 #D9CC66

monochromatic

#27709D #3593CD #66ADD9 #97C7E5 #C8E2F1

Accessibility & contrast

On white

2.46

#66ADD9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.54

#66ADD9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADD9

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADD9	#FFFFFF	#000000	##000000
##66ADD9	1.00	2.46	8.54	8.54
#FFFFFF	2.46	1.00	21.00	21.00
#000000	8.54	21.00	1.00	1.00
##000000	8.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99ACDB

Deuteranopia (green-blind)

#89A0D8

Tritanopia (blue-blind)

#1BB8BC

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #66add9;
/* rgb */ color: rgb(102, 173, 217);
/* oklch */ color: oklch(71.8% 0.096 237.4);

Tailwind

colors: {
  custom: {
    50: '#99c5e5',
    500: '#66add9',
    950: '#000000',
  },
}

SCSS

$custom: #66add9;
$custom-light: #99c5e5;
$custom-dark: #000000;

JSON

{
  "hex": "#66add9",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 217
  },
  "hsl": {
    "h": 202.957,
    "s": 60.209,
    "l": 62.549
  },
  "oklch": {
    "l": 0.71817,
    "c": 0.09622,
    "h": 237.4
  },
  "luminance": 0.37722
}

Semantic roles & 50–950 ramp

primary

#66ADD9

secondary

#E2C8B8

accent

#5F1EC8

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1215

muted

#7E8184

Preview Lab

Preview with #66ADD9

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

Preview Lab → · Contrast checker → · Palette generator →