#66C0FB#66C0FB

#66C0FB is a light, vivid cyan. Relative luminance 0.475; OKLCH L 77.6% C 0.121 H 239.6°. Best body text is #000000 at 10.50:1 contrast (WCAG AA passes).

Color values

HEX	#66C0FB
RGB	rgb(102, 192, 251)
HSL	hsl(204, 95%, 69%)
HSV	hsv(204, 59%, 98%)
CMYK	cmyk(59.4%, 23.5%, 0%, 1.6%)
CIE-LAB	lab(74.50, -10.05, -37.21)
CIE-LCH	lch(74.50, 38.54, 254.89°)
OKLab	oklab(77.56% -0.0612 -0.1043)
OKLCH	oklch(77.56% 0.121 239.6)
XYZ	xyz(41.7352, 47.4851, 98.2142)
Luminance	0.4749 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C0FB #FBA166

analogous

#66FBEB #66C0FB #6676FB

triadic

#66C0FB #FB66C0 #C0FB66

tetradic

#66C0FB #EB66FB #FBA166 #76FB66

square

#66C0FB #EB66FB #FBA166 #76FB66

split-complementary

#66C0FB #FB6676 #FBEB66

monochromatic

#068AE1 #2AA7F9 #66C0FB #A2D9FD #DDF1FE

Accessibility & contrast

On white

2.00

#66C0FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.50

#66C0FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C0FB

10.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C0FB	#FFFFFF	#000000	##000000
##66C0FB	1.00	2.00	10.50	10.50
#FFFFFF	2.00	1.00	21.00	21.00
#000000	10.50	21.00	1.00	1.00
##000000	10.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5C0FE

Deuteranopia (green-blind)

#91B1FA

Tritanopia (blue-blind)

#00CFD4

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #66c0fb;
/* rgb */ color: rgb(102, 192, 251);
/* oklch */ color: oklch(77.6% 0.121 239.6);

Tailwind

colors: {
  custom: {
    50: '#9dd2fd',
    500: '#66c0fb',
    950: '#000000',
  },
}

SCSS

$custom: #66c0fb;
$custom-light: #9dd2fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66c0fb",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 251
  },
  "hsl": {
    "h": 203.758,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.77556,
    "c": 0.12093,
    "h": 239.6
  },
  "luminance": 0.47489
}

Semantic roles & 50–950 ramp

primary

#66C0FB

secondary

#F4DAC9

accent

#5B00E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1417

muted

#7F8285

Preview Lab

Preview with #66C0FB

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

Preview Lab → · Contrast checker → · Palette generator →