#66D8FB#66D8FB

#66D8FB is a very light, moderate cyan. Relative luminance 0.589; OKLCH L 82.9% C 0.114 H 220.9°. Best body text is #000000 at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#66D8FB
RGB	rgb(102, 216, 251)
HSL	hsl(194, 95%, 69%)
HSV	hsv(194, 59%, 98%)
CMYK	cmyk(59.4%, 13.9%, 0%, 1.6%)
CIE-LAB	lab(81.23, -22.50, -26.84)
CIE-LCH	lch(81.23, 35.02, 230.03°)
OKLab	oklab(82.92% -0.0861 -0.0746)
OKLCH	oklch(82.92% 0.114 220.9)
XYZ	xyz(47.4410, 58.8968, 100.1162)
Luminance	0.5890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D8FB #FB8966

analogous

#66FBD4 #66D8FB #668EFB

triadic

#66D8FB #FB66D8 #D8FB66

tetradic

#66D8FB #D466FB #FB8966 #8EFB66

square

#66D8FB #D466FB #FB8966 #8EFB66

split-complementary

#66D8FB #FB668E #FBD466

monochromatic

#06ADE1 #2AC9F9 #66D8FB #A2E7FD #DDF6FE

Accessibility & contrast

On white

1.64

#66D8FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.78

#66D8FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D8FB

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D8FB	#FFFFFF	#000000	##000000
##66D8FB	1.00	1.64	12.78	12.78
#FFFFFF	1.64	1.00	21.00	21.00
#000000	12.78	21.00	1.00	1.00
##000000	12.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3D3FD

Deuteranopia (green-blind)

#ADC3FB

Tritanopia (blue-blind)

#00E3E3

Achromatopsia (no color)

#CACACA

Design tokens & code

CSS

--color: #66d8fb;
/* rgb */ color: rgb(102, 216, 251);
/* oklch */ color: oklch(82.9% 0.114 220.9);

Tailwind

colors: {
  custom: {
    50: '#9ee4fc',
    500: '#66d8fb',
    950: '#000000',
  },
}

SCSS

$custom: #66d8fb;
$custom-light: #9ee4fc;
$custom-dark: #000000;

JSON

{
  "hex": "#66d8fb",
  "rgb": {
    "r": 102,
    "g": 216,
    "b": 251
  },
  "hsl": {
    "h": 194.094,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.8292,
    "c": 0.11392,
    "h": 220.9
  },
  "luminance": 0.58902
}

Semantic roles & 50–950 ramp

primary

#66D8FB

secondary

#D55730

accent

#3600E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D8FB

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

Preview Lab → · Contrast checker → · Palette generator →