#66C5FC#66C5FC

#66C5FC is a light, moderate cyan. Relative luminance 0.498; OKLCH L 78.7% C 0.119 H 236.4°. Best body text is #000000 at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#66C5FC
RGB	rgb(102, 197, 252)
HSL	hsl(202, 96%, 69%)
HSV	hsv(202, 60%, 99%)
CMYK	cmyk(59.5%, 21.8%, 0%, 1.2%)
CIE-LAB	lab(75.93, -12.41, -35.52)
CIE-LCH	lch(75.93, 37.62, 250.75°)
OKLab	oklab(78.71% -0.066 -0.0994)
OKLCH	oklch(78.71% 0.119 236.4)
XYZ	xyz(43.0098, 49.7814, 99.4188)
Luminance	0.4979 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C5FC #FC9D66

analogous

#66FCE8 #66C5FC #667AFC

triadic

#66C5FC #FC66C5 #C5FC66

tetradic

#66C5FC #E866FC #FC9D66 #7AFC66

square

#66C5FC #E866FC #FC9D66 #7AFC66

split-complementary

#66C5FC #FC667A #FCE866

monochromatic

#0491E3 #2AAEFB #66C5FC #A2DCFD #DEF3FE

Accessibility & contrast

On white

1.92

#66C5FC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.96

#66C5FC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C5FC

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C5FC	#FFFFFF	#000000	##000000
##66C5FC	1.00	1.92	10.96	10.96
#FFFFFF	1.92	1.00	21.00	21.00
#000000	10.96	21.00	1.00	1.00
##000000	10.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABC4FF

Deuteranopia (green-blind)

#97B4FB

Tritanopia (blue-blind)

#00D3D7

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #66c5fc;
/* rgb */ color: rgb(102, 197, 252);
/* oklch */ color: oklch(78.7% 0.119 236.4);

Tailwind

colors: {
  custom: {
    50: '#9dd6fd',
    500: '#66c5fc',
    950: '#000000',
  },
}

SCSS

$custom: #66c5fc;
$custom-light: #9dd6fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66c5fc",
  "rgb": {
    "r": 102,
    "g": 197,
    "b": 252
  },
  "hsl": {
    "h": 202,
    "s": 96.154,
    "l": 69.412
  },
  "oklch": {
    "l": 0.78708,
    "c": 0.11937,
    "h": 236.4
  },
  "luminance": 0.49786
}

Semantic roles & 50–950 ramp

primary

#66C5FC

secondary

#F5D9C9

accent

#5400E6

background

#FAFDFF

surface

#F4FAFF

border

#CED3D7

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C5FC

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

Preview Lab → · Contrast checker → · Palette generator →