#66ADFB#66ADFB

#66ADFB is a light, vivid cyan. Relative luminance 0.397; OKLCH L 73.4% C 0.135 H 252.1°. Best body text is #000000 at 8.94:1 contrast (WCAG AA passes).

Color values

HEX	#66ADFB
RGB	rgb(102, 173, 251)
HSL	hsl(211, 95%, 69%)
HSV	hsv(211, 59%, 98%)
CMYK	cmyk(59.4%, 31.1%, 0%, 1.6%)
CIE-LAB	lab(69.24, 0.39, -45.43)
CIE-LCH	lch(69.24, 45.43, 270.49°)
OKLab	oklab(73.41% -0.0414 -0.1282)
OKLCH	oklch(73.41% 0.135 252.1)
XYZ	xyz(37.8294, 39.6735, 96.9123)
Luminance	0.3968 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADFB #FBB466

analogous

#66F8FB #66ADFB #6A66FB

triadic

#66ADFB #FB66AD #ADFB66

tetradic

#66ADFB #FB66F8 #FBB466 #66FB6A

square

#66ADFB #FB66F8 #FBB466 #66FB6A

split-complementary

#66ADFB #FB6A66 #F8FB66

monochromatic

#066EE1 #2A8DF9 #66ADFB #A2CDFD #DDEDFE

Accessibility & contrast

On white

2.35

#66ADFB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.94

#66ADFB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADFB

8.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADFB	#FFFFFF	#000000	##000000
##66ADFB	1.00	2.35	8.94	8.94
#FFFFFF	2.35	1.00	21.00	21.00
#000000	8.94	21.00	1.00	1.00
##000000	8.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8CB1FE

Deuteranopia (green-blind)

#78A3F9

Tritanopia (blue-blind)

#00BFC9

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #66adfb;
/* rgb */ color: rgb(102, 173, 251);
/* oklch */ color: oklch(73.4% 0.135 252.1);

Tailwind

colors: {
  custom: {
    50: '#9dc5fd',
    500: '#66adfb',
    950: '#000000',
  },
}

SCSS

$custom: #66adfb;
$custom-light: #9dc5fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66adfb",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 251
  },
  "hsl": {
    "h": 211.409,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.73408,
    "c": 0.13472,
    "h": 252.1
  },
  "luminance": 0.39677
}

Semantic roles & 50–950 ramp

primary

#66ADFB

secondary

#F4DFC9

accent

#7800E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ADFB

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

Preview Lab → · Contrast checker → · Palette generator →