#66C3FD#66C3FD

#66C3FD is a light, vivid cyan. Relative luminance 0.489; OKLCH L 78.3% C 0.121 H 238.4°. Best body text is #000000 at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#66C3FD
RGB	rgb(102, 195, 253)
HSL	hsl(203, 97%, 70%)
HSV	hsv(203, 60%, 99%)
CMYK	cmyk(59.7%, 22.9%, 0%, 0.8%)
CIE-LAB	lab(75.42, -11.04, -36.86)
CIE-LCH	lch(75.42, 38.48, 253.33°)
OKLab	oklab(78.31% -0.0636 -0.1033)
OKLCH	oklch(78.31% 0.121 238.4)
XYZ	xyz(42.7175, 48.9427, 100.1052)
Luminance	0.4895 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C3FD #FDA066

analogous

#66FDEB #66C3FD #6678FD

triadic

#66C3FD #FD66C3 #C3FD66

tetradic

#66C3FD #EB66FD #FDA066 #78FD66

square

#66C3FD #EB66FD #FDA066 #78FD66

split-complementary

#66C3FD #FD6678 #FDEB66

monochromatic

#038FE6 #2AABFC #66C3FD #A2DBFE #DFF2FF

Accessibility & contrast

On white

1.95

#66C3FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.79

#66C3FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3FD

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C3FD	#FFFFFF	#000000	##000000
##66C3FD	1.00	1.95	10.79	10.79
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.79	21.00	1.00	1.00
##000000	10.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8C2FF

Deuteranopia (green-blind)

#94B3FC

Tritanopia (blue-blind)

#00D2D7

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #66c3fd;
/* rgb */ color: rgb(102, 195, 253);
/* oklch */ color: oklch(78.3% 0.121 238.4);

Tailwind

colors: {
  custom: {
    50: '#9dd5fe',
    500: '#66c3fd',
    950: '#000000',
  },
}

SCSS

$custom: #66c3fd;
$custom-light: #9dd5fe;
$custom-dark: #000000;

JSON

{
  "hex": "#66c3fd",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 253
  },
  "hsl": {
    "h": 203.046,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.78309,
    "c": 0.12133,
    "h": 238.4
  },
  "luminance": 0.48947
}

Semantic roles & 50–950 ramp

primary

#66C3FD

secondary

#F5DACA

accent

#5800E6

background

#FAFDFF

surface

#F4FAFF

border

#CED3D7

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C3FD

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

Preview Lab → · Contrast checker → · Palette generator →