#66C3FB#66C3FB

#66C3FB is a light, moderate cyan. Relative luminance 0.488; OKLCH L 78.2% C 0.119 H 237.4°. Best body text is #000000 at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#66C3FB
RGB	rgb(102, 195, 251)
HSL	hsl(203, 95%, 69%)
HSV	hsv(203, 59%, 98%)
CMYK	cmyk(59.4%, 22.3%, 0%, 1.6%)
CIE-LAB	lab(75.34, -11.65, -35.91)
CIE-LCH	lch(75.34, 37.75, 252.03°)
OKLab	oklab(78.22% -0.0643 -0.1006)
OKLCH	oklch(78.22% 0.119 237.4)
XYZ	xyz(42.4006, 48.8160, 98.4360)
Luminance	0.4882 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C3FB #FB9E66

analogous

#66FBE8 #66C3FB #6679FB

triadic

#66C3FB #FB66C3 #C3FB66

tetradic

#66C3FB #E866FB #FB9E66 #79FB66

square

#66C3FB #E866FB #FB9E66 #79FB66

split-complementary

#66C3FB #FB6679 #FBE866

monochromatic

#068EE1 #2AACF9 #66C3FB #A2DAFD #DDF2FE

Accessibility & contrast

On white

1.95

#66C3FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.76

#66C3FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3FB

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C3FB	#FFFFFF	#000000	##000000
##66C3FB	1.00	1.95	10.76	10.76
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.76	21.00	1.00	1.00
##000000	10.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9C2FE

Deuteranopia (green-blind)

#95B3FA

Tritanopia (blue-blind)

#00D1D6

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #66c3fb;
/* rgb */ color: rgb(102, 195, 251);
/* oklch */ color: oklch(78.2% 0.119 237.4);

Tailwind

colors: {
  custom: {
    50: '#9dd5fd',
    500: '#66c3fb',
    950: '#000000',
  },
}

SCSS

$custom: #66c3fb;
$custom-light: #9dd5fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66c3fb",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 251
  },
  "hsl": {
    "h": 202.55,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.7822,
    "c": 0.11936,
    "h": 237.4
  },
  "luminance": 0.4882
}

Semantic roles & 50–950 ramp

primary

#66C3FB

secondary

#F4D9C9

accent

#5600E6

background

#FAFDFF

surface

#F4FAFF

border

#CED3D7

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C3FB

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

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