#66ADD8#66ADD8

#66ADD8 is a light, moderate cyan. Relative luminance 0.377; OKLCH L 71.8% C 0.095 H 236.7°. Best body text is #000000 at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#66ADD8
RGB	rgb(102, 173, 216)
HSL	hsl(203, 59%, 62%)
HSV	hsv(203, 53%, 85%)
CMYK	cmyk(52.8%, 19.9%, 0%, 15.3%)
CIE-LAB	lab(67.77, -10.34, -28.58)
CIE-LCH	lch(67.77, 30.39, 250.11°)
OKLab	oklab(71.77% -0.0522 -0.0796)
OKLCH	oklch(71.77% 0.095 236.7)
XYZ	xyz(32.8132, 37.6670, 70.4937)
Luminance	0.3767 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADD8 #D89166

analogous

#66D8CA #66ADD8 #6674D8

triadic

#66ADD8 #D866AD #ADD866

tetradic

#66ADD8 #CA66D8 #D89166 #74D866

square

#66ADD8 #CA66D8 #D89166 #74D866

split-complementary

#66ADD8 #D86674 #D8CA66

monochromatic

#28709C #3593CC #66ADD8 #97C7E4 #C8E1F1

Accessibility & contrast

On white

2.46

#66ADD8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.53

#66ADD8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADD8

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADD8	#FFFFFF	#000000	##000000
##66ADD8	1.00	2.46	8.53	8.53
#FFFFFF	2.46	1.00	21.00	21.00
#000000	8.53	21.00	1.00	1.00
##000000	8.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99ACDA

Deuteranopia (green-blind)

#89A0D7

Tritanopia (blue-blind)

#1DB8BB

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #66add8;
/* rgb */ color: rgb(102, 173, 216);
/* oklch */ color: oklch(71.8% 0.095 236.7);

Tailwind

colors: {
  custom: {
    50: '#99c5e4',
    500: '#66add8',
    950: '#000000',
  },
}

SCSS

$custom: #66add8;
$custom-light: #99c5e4;
$custom-dark: #000000;

JSON

{
  "hex": "#66add8",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 216
  },
  "hsl": {
    "h": 202.632,
    "s": 59.375,
    "l": 62.353
  },
  "oklch": {
    "l": 0.71773,
    "c": 0.09523,
    "h": 236.7
  },
  "luminance": 0.3767
}

Semantic roles & 50–950 ramp

primary

#66ADD8

secondary

#E2C8B8

accent

#5E1EC7

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0E1215

muted

#7E8183

Preview Lab

Preview with #66ADD8

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

Preview Lab → · Contrast checker → · Palette generator →