#66B7FD#66B7FD

#66B7FD is a light, vivid cyan. Relative luminance 0.438; OKLCH L 75.7% C 0.129 H 246.6°. Best body text is #000000 at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#66B7FD
RGB	rgb(102, 183, 253)
HSL	hsl(208, 97%, 70%)
HSV	hsv(208, 60%, 99%)
CMYK	cmyk(59.7%, 27.7%, 0%, 0.8%)
CIE-LAB	lab(72.08, -4.54, -42.05)
CIE-LCH	lch(72.08, 42.30, 263.84°)
OKLab	oklab(75.67% -0.0512 -0.1183)
OKLCH	oklch(75.67% 0.129 246.6)
XYZ	xyz(40.1361, 43.7799, 99.2447)
Luminance	0.4378 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B7FD #FDAC66

analogous

#66FDF8 #66B7FD #666BFD

triadic

#66B7FD #FD66B7 #B7FD66

tetradic

#66B7FD #F866FD #FDAC66 #6BFD66

square

#66B7FD #F866FD #FDAC66 #6BFD66

split-complementary

#66B7FD #FD666B #FDF866

monochromatic

#037DE6 #2A9BFC #66B7FD #A2D3FE #DFF0FF

Accessibility & contrast

On white

2.15

#66B7FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.76

#66B7FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B7FD

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B7FD	#FFFFFF	#000000	##000000
##66B7FD	1.00	2.15	9.76	9.76
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.76	21.00	1.00	1.00
##000000	9.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99B9FF

Deuteranopia (green-blind)

#84AAFC

Tritanopia (blue-blind)

#00C8CF

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66b7fd;
/* rgb */ color: rgb(102, 183, 253);
/* oklch */ color: oklch(75.7% 0.129 246.6);

Tailwind

colors: {
  custom: {
    50: '#9dccfe',
    500: '#66b7fd',
    950: '#000000',
  },
}

SCSS

$custom: #66b7fd;
$custom-light: #9dccfe;
$custom-dark: #000000;

JSON

{
  "hex": "#66b7fd",
  "rgb": {
    "r": 102,
    "g": 183,
    "b": 253
  },
  "hsl": {
    "h": 207.815,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.75673,
    "c": 0.12895,
    "h": 246.6
  },
  "luminance": 0.43784
}

Semantic roles & 50–950 ramp

primary

#66B7FD

secondary

#F5DECA

accent

#6A00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #66B7FD

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

Preview Lab → · Contrast checker → · Palette generator →