#66C5FB#66C5FB

#66C5FB is a light, moderate cyan. Relative luminance 0.497; OKLCH L 78.7% C 0.118 H 235.9°. Best body text is #000000 at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#66C5FB
RGB	rgb(102, 197, 251)
HSL	hsl(202, 95%, 69%)
HSV	hsv(202, 59%, 98%)
CMYK	cmyk(59.4%, 21.5%, 0%, 1.6%)
CIE-LAB	lab(75.90, -12.71, -35.04)
CIE-LCH	lch(75.90, 37.28, 250.07°)
OKLab	oklab(78.66% -0.0664 -0.0981)
OKLCH	oklch(78.66% 0.118 235.9)
XYZ	xyz(42.8517, 49.7182, 98.5864)
Luminance	0.4972 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C5FB #FB9C66

analogous

#66FBE7 #66C5FB #667BFB

triadic

#66C5FB #FB66C5 #C5FB66

tetradic

#66C5FB #E766FB #FB9C66 #7BFB66

square

#66C5FB #E766FB #FB9C66 #7BFB66

split-complementary

#66C5FB #FB667B #FBE766

monochromatic

#0691E1 #2AAEF9 #66C5FB #A2DCFD #DDF2FE

Accessibility & contrast

On white

1.92

#66C5FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.94

#66C5FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C5FB

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C5FB	#FFFFFF	#000000	##000000
##66C5FB	1.00	1.92	10.94	10.94
#FFFFFF	1.92	1.00	21.00	21.00
#000000	10.94	21.00	1.00	1.00
##000000	10.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACC4FE

Deuteranopia (green-blind)

#97B4FA

Tritanopia (blue-blind)

#00D3D7

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #66c5fb;
/* rgb */ color: rgb(102, 197, 251);
/* oklch */ color: oklch(78.7% 0.118 235.9);

Tailwind

colors: {
  custom: {
    50: '#9dd6fd',
    500: '#66c5fb',
    950: '#000000',
  },
}

SCSS

$custom: #66c5fb;
$custom-light: #9dd6fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66c5fb",
  "rgb": {
    "r": 102,
    "g": 197,
    "b": 251
  },
  "hsl": {
    "h": 201.745,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.78664,
    "c": 0.11842,
    "h": 235.9
  },
  "luminance": 0.49722
}

Semantic roles & 50–950 ramp

primary

#66C5FB

secondary

#F4D8C9

accent

#5300E6

background

#FAFDFF

surface

#F4FAFF

border

#CED3D7

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C5FB

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

Preview Lab → · Contrast checker → · Palette generator →