#63B9F4#63B9F4

#63B9F4 is a light, moderate cyan. Relative luminance 0.439; OKLCH L 75.6% C 0.119 H 240.8°. Best body text is #000000 at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#63B9F4
RGB	rgb(99, 185, 244)
HSL	hsl(204, 87%, 67%)
HSV	hsv(204, 59%, 96%)
CMYK	cmyk(59.4%, 24.2%, 0%, 4.3%)
CIE-LAB	lab(72.15, -8.98, -37.10)
CIE-LCH	lch(72.15, 38.17, 256.39°)
OKLab	oklab(75.57% -0.0582 -0.1041)
OKLCH	oklch(75.57% 0.119 240.8)
XYZ	xyz(38.8176, 43.8786, 91.9942)
Luminance	0.4388 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9F4 #F49E63

analogous

#63F4E7 #63B9F4 #6371F4

triadic

#63B9F4 #F463B9 #B9F463

tetradic

#63B9F4 #E763F4 #F49E63 #71F463

square

#63B9F4 #E763F4 #F49E63 #71F463

split-complementary

#63B9F4 #F46371 #F4E763

monochromatic

#0F80CE #2A9FF0 #63B9F4 #9CD3F8 #D5ECFC

Accessibility & contrast

On white

2.15

#63B9F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.78

#63B9F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9F4

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9F4	#FFFFFF	#000000	##000000
##63B9F4	1.00	2.15	9.78	9.78
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.78	21.00	1.00	1.00
##000000	9.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB9F7

Deuteranopia (green-blind)

#8BAAF3

Tritanopia (blue-blind)

#00C8CD

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #63b9f4;
/* rgb */ color: rgb(99, 185, 244);
/* oklch */ color: oklch(75.6% 0.119 240.8);

Tailwind

colors: {
  custom: {
    50: '#9bcdf8',
    500: '#63b9f4',
    950: '#000000',
  },
}

SCSS

$custom: #63b9f4;
$custom-light: #9bcdf8;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9f4",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 244
  },
  "hsl": {
    "h": 204.414,
    "s": 86.826,
    "l": 67.255
  },
  "oklch": {
    "l": 0.7557,
    "c": 0.11922,
    "h": 240.8
  },
  "luminance": 0.43882
}

Semantic roles & 50–950 ramp

primary

#63B9F4

secondary

#F0D5C3

accent

#5E02E3

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B9F4

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

Preview Lab → · Contrast checker → · Palette generator →