#66D3F3#66D3F3

#66D3F3 is a light, moderate cyan. Relative luminance 0.559; OKLCH L 81.5% C 0.109 H 219.8°. Best body text is #000000 at 12.18:1 contrast (WCAG AA passes).

Color values

HEX	#66D3F3
RGB	rgb(102, 211, 243)
HSL	hsl(194, 85%, 68%)
HSV	hsv(194, 58%, 95%)
CMYK	cmyk(58%, 13.2%, 0%, 4.7%)
CIE-LAB	lab(79.55, -22.29, -25.16)
CIE-LCH	lch(79.55, 33.62, 228.45°)
OKLab	oklab(81.48% -0.0838 -0.0699)
OKLCH	oklch(81.48% 0.109 219.8)
XYZ	xyz(44.9450, 55.8800, 93.1940)
Luminance	0.5588 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D3F3 #F38666

analogous

#66F3CD #66D3F3 #668CF3

triadic

#66D3F3 #F366D3 #D3F366

tetradic

#66D3F3 #CD66F3 #F38666 #8CF366

square

#66D3F3 #CD66F3 #F38666 #8CF366

split-complementary

#66D3F3 #F3668C #F3CD66

monochromatic

#10A3CE #2DC3EF #66D3F3 #9FE3F7 #D7F4FC

Accessibility & contrast

On white

1.72

#66D3F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.18

#66D3F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D3F3

12.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D3F3	#FFFFFF	#000000	##000000
##66D3F3	1.00	1.72	12.18	12.18
#FFFFFF	1.72	1.00	21.00	21.00
#000000	12.18	21.00	1.00	1.00
##000000	12.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BFCEF5

Deuteranopia (green-blind)

#ABBEF3

Tritanopia (blue-blind)

#00DEDD

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #66d3f3;
/* rgb */ color: rgb(102, 211, 243);
/* oklch */ color: oklch(81.5% 0.109 219.8);

Tailwind

colors: {
  custom: {
    50: '#9de0f7',
    500: '#66d3f3',
    950: '#000000',
  },
}

SCSS

$custom: #66d3f3;
$custom-light: #9de0f7;
$custom-dark: #000000;

JSON

{
  "hex": "#66d3f3",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 243
  },
  "hsl": {
    "h": 193.617,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.81476,
    "c": 0.10915,
    "h": 219.8
  },
  "luminance": 0.55884
}

Semantic roles & 50–950 ramp

primary

#66D3F3

secondary

#CA5533

accent

#3604E2

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D3F3

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

Preview Lab → · Contrast checker → · Palette generator →