#66C3F9#66C3F9

#66C3F9 is a light, moderate cyan. Relative luminance 0.487; OKLCH L 78.1% C 0.117 H 236.4°. Best body text is #000000 at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#66C3F9
RGB	rgb(102, 195, 249)
HSL	hsl(202, 92%, 69%)
HSV	hsv(202, 59%, 98%)
CMYK	cmyk(59%, 21.7%, 0%, 2.4%)
CIE-LAB	lab(75.26, -12.25, -34.96)
CIE-LCH	lch(75.26, 37.04, 250.68°)
OKLab	oklab(78.13% -0.0649 -0.0978)
OKLCH	oklch(78.13% 0.117 236.4)
XYZ	xyz(42.0870, 48.6905, 96.7844)
Luminance	0.4869 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C3F9 #F99C66

analogous

#66F9E6 #66C3F9 #667AF9

triadic

#66C3F9 #F966C3 #C3F966

tetradic

#66C3F9 #E666F9 #F99C66 #7AF966

square

#66C3F9 #E666F9 #F99C66 #7AF966

split-complementary

#66C3F9 #F9667A #F9E666

monochromatic

#098EDC #2BACF7 #66C3F9 #A1DAFB #DCF1FE

Accessibility & contrast

On white

1.96

#66C3F9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.74

#66C3F9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3F9

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C3F9	#FFFFFF	#000000	##000000
##66C3F9	1.00	1.96	10.74	10.74
#FFFFFF	1.96	1.00	21.00	21.00
#000000	10.74	21.00	1.00	1.00
##000000	10.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAC2FC

Deuteranopia (green-blind)

#95B3F8

Tritanopia (blue-blind)

#00D1D5

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #66c3f9;
/* rgb */ color: rgb(102, 195, 249);
/* oklch */ color: oklch(78.1% 0.117 236.4);

Tailwind

colors: {
  custom: {
    50: '#9dd5fb',
    500: '#66c3f9',
    950: '#000000',
  },
}

SCSS

$custom: #66c3f9;
$custom-light: #9dd5fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66c3f9",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 249
  },
  "hsl": {
    "h": 202.041,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.78132,
    "c": 0.11743,
    "h": 236.4
  },
  "luminance": 0.48695
}

Semantic roles & 50–950 ramp

primary

#66C3F9

secondary

#F3D8C8

accent

#5400E6

background

#FAFDFF

surface

#F4FAFF

border

#CED3D7

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C3F9

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

Preview Lab → · Contrast checker → · Palette generator →