#66D4FB#66D4FB

#66D4FB is a very light, moderate cyan. Relative luminance 0.569; OKLCH L 82.0% C 0.114 H 224.1°. Best body text is #000000 at 12.38:1 contrast (WCAG AA passes).

Color values

HEX	#66D4FB
RGB	rgb(102, 212, 251)
HSL	hsl(196, 95%, 69%)
HSV	hsv(196, 59%, 98%)
CMYK	cmyk(59.4%, 15.5%, 0%, 1.6%)
CIE-LAB	lab(80.11, -20.48, -28.56)
CIE-LCH	lch(80.11, 35.14, 234.36°)
OKLab	oklab(82.02% -0.0819 -0.0795)
OKLCH	oklch(82.02% 0.114 224.1)
XYZ	xyz(46.4287, 56.8722, 99.7787)
Luminance	0.5688 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D4FB #FB8D66

analogous

#66FBD8 #66D4FB #668AFB

triadic

#66D4FB #FB66D4 #D4FB66

tetradic

#66D4FB #D866FB #FB8D66 #8AFB66

square

#66D4FB #D866FB #FB8D66 #8AFB66

split-complementary

#66D4FB #FB668A #FBD866

monochromatic

#06A7E1 #2AC3F9 #66D4FB #A2E5FD #DDF6FE

Accessibility & contrast

On white

1.70

#66D4FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.38

#66D4FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D4FB

12.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D4FB	#FFFFFF	#000000	##000000
##66D4FB	1.00	1.70	12.38	12.38
#FFFFFF	1.70	1.00	21.00	21.00
#000000	12.38	21.00	1.00	1.00
##000000	12.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BED0FD

Deuteranopia (green-blind)

#A9C0FB

Tritanopia (blue-blind)

#00E0E0

Achromatopsia (no color)

#C7C7C7

Design tokens & code

CSS

--color: #66d4fb;
/* rgb */ color: rgb(102, 212, 251);
/* oklch */ color: oklch(82.0% 0.114 224.1);

Tailwind

colors: {
  custom: {
    50: '#9ee1fc',
    500: '#66d4fb',
    950: '#000000',
  },
}

SCSS

$custom: #66d4fb;
$custom-light: #9ee1fc;
$custom-dark: #000000;

JSON

{
  "hex": "#66d4fb",
  "rgb": {
    "r": 102,
    "g": 212,
    "b": 251
  },
  "hsl": {
    "h": 195.705,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.82019,
    "c": 0.11419,
    "h": 224.1
  },
  "luminance": 0.56877
}

Semantic roles & 50–950 ramp

primary

#66D4FB

secondary

#D55B30

accent

#3C00E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D4FB

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

Preview Lab → · Contrast checker → · Palette generator →