#63B9FD#63B9FD

#63B9FD is a light, vivid cyan. Relative luminance 0.444; OKLCH L 76.0% C 0.129 H 244.6°. Best body text is #000000 at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#63B9FD
RGB	rgb(99, 185, 253)
HSL	hsl(206, 97%, 69%)
HSV	hsv(206, 61%, 99%)
CMYK	cmyk(60.9%, 26.9%, 0%, 0.8%)
CIE-LAB	lab(72.52, -6.18, -41.37)
CIE-LCH	lch(72.52, 41.83, 261.50°)
OKLab	oklab(75.99% -0.0554 -0.1164)
OKLCH	oklch(75.99% 0.129 244.6)
XYZ	xyz(40.2176, 44.4386, 99.3675)
Luminance	0.4444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9FD #FDA763

analogous

#63FDF4 #63B9FD #636CFD

triadic

#63B9FD #FD63B9 #B9FD63

tetradic

#63B9FD #F463FD #FDA763 #6CFD63

square

#63B9FD #F463FD #FDA763 #6CFD63

split-complementary

#63B9FD #FD636C #FDF463

monochromatic

#0380E3 #279EFC #63B9FD #9FD4FE #DCEFFF

Accessibility & contrast

On white

2.12

#63B9FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.89

#63B9FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9FD

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9FD	#FFFFFF	#000000	##000000
##63B9FD	1.00	2.12	9.89	9.89
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.89	21.00	1.00	1.00
##000000	9.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BBAFF

Deuteranopia (green-blind)

#86ABFC

Tritanopia (blue-blind)

#00C9D1

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #63b9fd;
/* rgb */ color: rgb(99, 185, 253);
/* oklch */ color: oklch(76.0% 0.129 244.6);

Tailwind

colors: {
  custom: {
    50: '#9ccdfe',
    500: '#63b9fd',
    950: '#000000',
  },
}

SCSS

$custom: #63b9fd;
$custom-light: #9ccdfe;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9fd",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 253
  },
  "hsl": {
    "h": 206.494,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.75988,
    "c": 0.12892,
    "h": 244.6
  },
  "luminance": 0.44442
}

Semantic roles & 50–950 ramp

primary

#63B9FD

secondary

#F4DBC7

accent

#6500E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #63B9FD

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

Preview Lab → · Contrast checker → · Palette generator →