#63B9FF#63B9FF

#63B9FF is a light, vivid cyan. Relative luminance 0.446; OKLCH L 76.1% C 0.131 H 245.3°. Best body text is #000000 at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#63B9FF
RGB	rgb(99, 185, 255)
HSL	hsl(207, 100%, 69%)
HSV	hsv(207, 61%, 100%)
CMYK	cmyk(61.2%, 27.5%, 0%, 0%)
CIE-LAB	lab(72.61, -5.55, -42.32)
CIE-LCH	lch(72.61, 42.68, 262.52°)
OKLab	oklab(76.08% -0.0548 -0.1191)
OKLCH	oklch(76.08% 0.131 245.3)
XYZ	xyz(40.5378, 44.5667, 101.0542)
Luminance	0.4457 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9FF #FFA963

analogous

#63FFF7 #63B9FF #636BFF

triadic

#63B9FF #FF63B9 #B9FF63

tetradic

#63B9FF #F763FF #FFA963 #6BFF63

square

#63B9FF #F763FF #FFA963 #6BFF63

split-complementary

#63B9FF #FF636B #FFF763

monochromatic

#0080E8 #269EFF #63B9FF #A0D4FF #DDF0FF

Accessibility & contrast

On white

2.12

#63B9FF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.91

#63B9FF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9FF

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9FF	#FFFFFF	#000000	##000000
##63B9FF	1.00	2.12	9.91	9.91
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.91	21.00	1.00	1.00
##000000	9.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9ABBFF

Deuteranopia (green-blind)

#85ABFE

Tritanopia (blue-blind)

#00CAD1

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #63b9ff;
/* rgb */ color: rgb(99, 185, 255);
/* oklch */ color: oklch(76.1% 0.131 245.3);

Tailwind

colors: {
  custom: {
    50: '#9ccdff',
    500: '#63b9ff',
    950: '#000000',
  },
}

SCSS

$custom: #63b9ff;
$custom-light: #9ccdff;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9ff",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 255
  },
  "hsl": {
    "h": 206.923,
    "s": 100,
    "l": 69.412
  },
  "oklch": {
    "l": 0.76083,
    "c": 0.13113,
    "h": 245.3
  },
  "luminance": 0.44571
}

Semantic roles & 50–950 ramp

primary

#63B9FF

secondary

#F5DDC8

accent

#6700E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #63B9FF

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

Preview Lab → · Contrast checker → · Palette generator →