#66D1FB#66D1FB

#66D1FB is a light, moderate cyan. Relative luminance 0.554; OKLCH L 81.3% C 0.115 H 226.5°. Best body text is #000000 at 12.08:1 contrast (WCAG AA passes).

Color values

HEX	#66D1FB
RGB	rgb(102, 209, 251)
HSL	hsl(197, 95%, 69%)
HSV	hsv(197, 59%, 98%)
CMYK	cmyk(59.4%, 16.7%, 0%, 1.6%)
CIE-LAB	lab(79.26, -18.95, -29.85)
CIE-LCH	lch(79.26, 35.36, 237.59°)
OKLab	oklab(81.34% -0.0788 -0.0832)
OKLCH	oklch(81.34% 0.115 226.5)
XYZ	xyz(45.6857, 55.3863, 99.5311)
Luminance	0.5539 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D1FB #FB9066

analogous

#66FBDB #66D1FB #6687FB

triadic

#66D1FB #FB66D1 #D1FB66

tetradic

#66D1FB #DB66FB #FB9066 #87FB66

square

#66D1FB #DB66FB #FB9066 #87FB66

split-complementary

#66D1FB #FB6687 #FBDB66

monochromatic

#06A3E1 #2ABFF9 #66D1FB #A2E3FD #DDF5FE

Accessibility & contrast

On white

1.74

#66D1FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.08

#66D1FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D1FB

12.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D1FB	#FFFFFF	#000000	##000000
##66D1FB	1.00	1.74	12.08	12.08
#FFFFFF	1.74	1.00	21.00	21.00
#000000	12.08	21.00	1.00	1.00
##000000	12.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BACDFD

Deuteranopia (green-blind)

#A5BDFB

Tritanopia (blue-blind)

#00DDDF

Achromatopsia (no color)

#C4C4C4

Design tokens & code

CSS

--color: #66d1fb;
/* rgb */ color: rgb(102, 209, 251);
/* oklch */ color: oklch(81.3% 0.115 226.5);

Tailwind

colors: {
  custom: {
    50: '#9edffc',
    500: '#66d1fb',
    950: '#000000',
  },
}

SCSS

$custom: #66d1fb;
$custom-light: #9edffc;
$custom-dark: #000000;

JSON

{
  "hex": "#66d1fb",
  "rgb": {
    "r": 102,
    "g": 209,
    "b": 251
  },
  "hsl": {
    "h": 196.913,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.81344,
    "c": 0.11463,
    "h": 226.5
  },
  "luminance": 0.55391
}

Semantic roles & 50–950 ramp

primary

#66D1FB

secondary

#D55F30

accent

#4100E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D1FB

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

Preview Lab → · Contrast checker → · Palette generator →