#66D7FB#66D7FB

#66D7FB is a very light, moderate cyan. Relative luminance 0.584; OKLCH L 82.7% C 0.114 H 221.7°. Best body text is #000000 at 12.68:1 contrast (WCAG AA passes).

Color values

HEX	#66D7FB
RGB	rgb(102, 215, 251)
HSL	hsl(194, 95%, 69%)
HSV	hsv(194, 59%, 98%)
CMYK	cmyk(59.4%, 14.3%, 0%, 1.6%)
CIE-LAB	lab(80.95, -21.99, -27.27)
CIE-LCH	lch(80.95, 35.03, 231.11°)
OKLab	oklab(82.69% -0.085 -0.0758)
OKLCH	oklch(82.69% 0.114 221.7)
XYZ	xyz(47.1856, 58.3860, 100.0310)
Luminance	0.5839 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D7FB #FB8A66

analogous

#66FBD5 #66D7FB #668DFB

triadic

#66D7FB #FB66D7 #D7FB66

tetradic

#66D7FB #D566FB #FB8A66 #8DFB66

square

#66D7FB #D566FB #FB8A66 #8DFB66

split-complementary

#66D7FB #FB668D #FBD566

monochromatic

#06ACE1 #2AC7F9 #66D7FB #A2E7FD #DDF6FE

Accessibility & contrast

On white

1.66

#66D7FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.68

#66D7FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D7FB

12.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D7FB	#FFFFFF	#000000	##000000
##66D7FB	1.00	1.66	12.68	12.68
#FFFFFF	1.66	1.00	21.00	21.00
#000000	12.68	21.00	1.00	1.00
##000000	12.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C2D2FD

Deuteranopia (green-blind)

#ACC2FB

Tritanopia (blue-blind)

#00E3E2

Achromatopsia (no color)

#C9C9C9

Design tokens & code

CSS

--color: #66d7fb;
/* rgb */ color: rgb(102, 215, 251);
/* oklch */ color: oklch(82.7% 0.114 221.7);

Tailwind

colors: {
  custom: {
    50: '#9ee3fc',
    500: '#66d7fb',
    950: '#000000',
  },
}

SCSS

$custom: #66d7fb;
$custom-light: #9ee3fc;
$custom-dark: #000000;

JSON

{
  "hex": "#66d7fb",
  "rgb": {
    "r": 102,
    "g": 215,
    "b": 251
  },
  "hsl": {
    "h": 194.497,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.82694,
    "c": 0.11395,
    "h": 221.7
  },
  "luminance": 0.58391
}

Semantic roles & 50–950 ramp

primary

#66D7FB

secondary

#D55830

accent

#3700E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D7FB

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

Preview Lab → · Contrast checker → · Palette generator →