#66D0FB#66D0FB

#66D0FB is a light, moderate cyan. Relative luminance 0.549; OKLCH L 81.1% C 0.115 H 227.3°. Best body text is #000000 at 11.98:1 contrast (WCAG AA passes).

Color values

HEX	#66D0FB
RGB	rgb(102, 208, 251)
HSL	hsl(197, 95%, 69%)
HSV	hsv(197, 59%, 98%)
CMYK	cmyk(59.4%, 17.1%, 0%, 1.6%)
CIE-LAB	lab(78.98, -18.44, -30.29)
CIE-LCH	lch(78.98, 35.46, 238.67°)
OKLab	oklab(81.12% -0.0778 -0.0844)
OKLCH	oklch(81.12% 0.115 227.3)
XYZ	xyz(45.4412, 54.8971, 99.4495)
Luminance	0.5490 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D0FB #FB9166

analogous

#66FBDB #66D0FB #6686FB

triadic

#66D0FB #FB66D0 #D0FB66

tetradic

#66D0FB #DB66FB #FB9166 #86FB66

square

#66D0FB #DB66FB #FB9166 #86FB66

split-complementary

#66D0FB #FB6686 #FBDB66

monochromatic

#06A2E1 #2ABEF9 #66D0FB #A2E2FD #DDF5FE

Accessibility & contrast

On white

1.75

#66D0FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.98

#66D0FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D0FB

11.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D0FB	#FFFFFF	#000000	##000000
##66D0FB	1.00	1.75	11.98	11.98
#FFFFFF	1.75	1.00	21.00	21.00
#000000	11.98	21.00	1.00	1.00
##000000	11.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9CCFD

Deuteranopia (green-blind)

#A4BDFA

Tritanopia (blue-blind)

#00DCDE

Achromatopsia (no color)

#C4C4C4

Design tokens & code

CSS

--color: #66d0fb;
/* rgb */ color: rgb(102, 208, 251);
/* oklch */ color: oklch(81.1% 0.115 227.3);

Tailwind

colors: {
  custom: {
    50: '#9edefc',
    500: '#66d0fb',
    950: '#000000',
  },
}

SCSS

$custom: #66d0fb;
$custom-light: #9edefc;
$custom-dark: #000000;

JSON

{
  "hex": "#66d0fb",
  "rgb": {
    "r": 102,
    "g": 208,
    "b": 251
  },
  "hsl": {
    "h": 197.315,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.8112,
    "c": 0.11482,
    "h": 227.3
  },
  "luminance": 0.54902
}

Semantic roles & 50–950 ramp

primary

#66D0FB

secondary

#D56030

accent

#4200E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D0FB

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

Preview Lab → · Contrast checker → · Palette generator →