#66CBF9#66CBF9

#66CBF9 is a light, moderate cyan. Relative luminance 0.524; OKLCH L 79.9% C 0.114 H 230.2°. Best body text is #000000 at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#66CBF9
RGB	rgb(102, 203, 249)
HSL	hsl(199, 92%, 69%)
HSV	hsv(199, 59%, 98%)
CMYK	cmyk(59%, 18.5%, 0%, 2.4%)
CIE-LAB	lab(77.50, -16.45, -31.49)
CIE-LCH	lch(77.50, 35.53, 242.42°)
OKLab	oklab(79.92% -0.0733 -0.0879)
OKLCH	oklch(79.92% 0.114 230.2)
XYZ	xyz(43.9277, 52.3720, 97.3980)
Luminance	0.5238 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CBF9 #F99466

analogous

#66F9DE #66CBF9 #6682F9

triadic

#66CBF9 #F966CB #CBF966

tetradic

#66CBF9 #DE66F9 #F99466 #82F966

square

#66CBF9 #DE66F9 #F99466 #82F966

split-complementary

#66CBF9 #F96682 #F9DE66

monochromatic

#099ADC #2BB7F7 #66CBF9 #A1DFFB #DCF3FE

Accessibility & contrast

On white

1.83

#66CBF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.48

#66CBF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CBF9

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CBF9	#FFFFFF	#000000	##000000
##66CBF9	1.00	1.83	11.48	11.48
#FFFFFF	1.83	1.00	21.00	21.00
#000000	11.48	21.00	1.00	1.00
##000000	11.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B4C8FB

Deuteranopia (green-blind)

#9FB9F8

Tritanopia (blue-blind)

#00D8DA

Achromatopsia (no color)

#BFBFBF

Design tokens & code

CSS

--color: #66cbf9;
/* rgb */ color: rgb(102, 203, 249);
/* oklch */ color: oklch(79.9% 0.114 230.2);

Tailwind

colors: {
  custom: {
    50: '#9ddafb',
    500: '#66cbf9',
    950: '#000000',
  },
}

SCSS

$custom: #66cbf9;
$custom-light: #9ddafb;
$custom-dark: #000000;

JSON

{
  "hex": "#66cbf9",
  "rgb": {
    "r": 102,
    "g": 203,
    "b": 249
  },
  "hsl": {
    "h": 198.776,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.79916,
    "c": 0.11445,
    "h": 230.2
  },
  "luminance": 0.52376
}

Semantic roles & 50–950 ramp

primary

#66CBF9

secondary

#D36330

accent

#4800E6

background

#FCFEFF

surface

#F6FBFF

border

#D0D4D7

text

#0F1517

muted

#808485

Preview Lab

Preview with #66CBF9

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

Preview Lab → · Contrast checker → · Palette generator →