#66B6FB#66B6FB

#66B6FB is a light, vivid cyan. Relative luminance 0.432; OKLCH L 75.4% C 0.127 H 246.5°. Best body text is #000000 at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#66B6FB
RGB	rgb(102, 182, 251)
HSL	hsl(208, 95%, 69%)
HSV	hsv(208, 59%, 98%)
CMYK	cmyk(59.4%, 27.5%, 0%, 1.6%)
CIE-LAB	lab(71.72, -4.61, -41.54)
CIE-LCH	lch(71.72, 41.79, 263.66°)
OKLab	oklab(75.36% -0.0507 -0.1169)
OKLCH	oklch(75.36% 0.127 246.5)
XYZ	xyz(39.6136, 43.2420, 97.5070)
Luminance	0.4325 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B6FB #FBAB66

analogous

#66FBF5 #66B6FB #666CFB

triadic

#66B6FB #FB66B6 #B6FB66

tetradic

#66B6FB #F566FB #FBAB66 #6CFB66

square

#66B6FB #F566FB #FBAB66 #6CFB66

split-complementary

#66B6FB #FB666C #FBF566

monochromatic

#067BE1 #2A9AF9 #66B6FB #A2D2FD #DDEFFE

Accessibility & contrast

On white

2.18

#66B6FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.65

#66B6FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B6FB

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B6FB	#FFFFFF	#000000	##000000
##66B6FB	1.00	2.18	9.65	9.65
#FFFFFF	2.18	1.00	21.00	21.00
#000000	9.65	21.00	1.00	1.00
##000000	9.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#98B8FE

Deuteranopia (green-blind)

#84A9FA

Tritanopia (blue-blind)

#00C6CE

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66b6fb;
/* rgb */ color: rgb(102, 182, 251);
/* oklch */ color: oklch(75.4% 0.127 246.5);

Tailwind

colors: {
  custom: {
    50: '#9dcbfd',
    500: '#66b6fb',
    950: '#000000',
  },
}

SCSS

$custom: #66b6fb;
$custom-light: #9dcbfd;
$custom-dark: #000000;

JSON

{
  "hex": "#66b6fb",
  "rgb": {
    "r": 102,
    "g": 182,
    "b": 251
  },
  "hsl": {
    "h": 207.785,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.75359,
    "c": 0.12741,
    "h": 246.5
  },
  "luminance": 0.43246
}

Semantic roles & 50–950 ramp

primary

#66B6FB

secondary

#F4DDC9

accent

#6A00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B6FB

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

Preview Lab → · Contrast checker → · Palette generator →