#66C8F9#66C8F9

#66C8F9 is a light, moderate cyan. Relative luminance 0.510; OKLCH L 79.2% C 0.115 H 232.5°. Best body text is #000000 at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#66C8F9
RGB	rgb(102, 200, 249)
HSL	hsl(200, 92%, 69%)
HSV	hsv(200, 59%, 98%)
CMYK	cmyk(59%, 19.7%, 0%, 2.4%)
CIE-LAB	lab(76.66, -14.89, -32.79)
CIE-LCH	lch(76.66, 36.01, 245.58°)
OKLab	oklab(79.25% -0.0702 -0.0916)
OKLCH	oklch(79.25% 0.115 232.5)
XYZ	xyz(43.2261, 50.9687, 97.1641)
Luminance	0.5097 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C8F9 #F99766

analogous

#66F9E1 #66C8F9 #667FF9

triadic

#66C8F9 #F966C8 #C8F966

tetradic

#66C8F9 #E166F9 #F99766 #7FF966

square

#66C8F9 #E166F9 #F99766 #7FF966

split-complementary

#66C8F9 #F9667F #F9E166

monochromatic

#0996DC #2BB3F7 #66C8F9 #A1DDFB #DCF2FE

Accessibility & contrast

On white

1.88

#66C8F9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.19

#66C8F9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C8F9

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C8F9	#FFFFFF	#000000	##000000
##66C8F9	1.00	1.88	11.19	11.19
#FFFFFF	1.88	1.00	21.00	21.00
#000000	11.19	21.00	1.00	1.00
##000000	11.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0C6FB

Deuteranopia (green-blind)

#9BB6F8

Tritanopia (blue-blind)

#00D5D8

Achromatopsia (no color)

#BDBDBD

Design tokens & code

CSS

--color: #66c8f9;
/* rgb */ color: rgb(102, 200, 249);
/* oklch */ color: oklch(79.2% 0.115 232.5);

Tailwind

colors: {
  custom: {
    50: '#9dd8fb',
    500: '#66c8f9',
    950: '#000000',
  },
}

SCSS

$custom: #66c8f9;
$custom-light: #9dd8fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66c8f9",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 249
  },
  "hsl": {
    "h": 200,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.79246,
    "c": 0.1154,
    "h": 232.5
  },
  "luminance": 0.50973
}

Semantic roles & 50–950 ramp

primary

#66C8F9

secondary

#D36730

accent

#4D00E6

background

#FCFEFF

surface

#F6FBFF

border

#D0D4D7

text

#0F1417

muted

#808385

Preview Lab

Preview with #66C8F9

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

Preview Lab → · Contrast checker → · Palette generator →