#63B4FB#63B4FB

#63B4FB is a light, vivid cyan. Relative luminance 0.423; OKLCH L 74.8% C 0.130 H 247.0°. Best body text is #000000 at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#63B4FB
RGB	rgb(99, 180, 251)
HSL	hsl(208, 95%, 69%)
HSV	hsv(208, 61%, 98%)
CMYK	cmyk(60.6%, 28.3%, 0%, 1.6%)
CIE-LAB	lab(71.05, -4.06, -42.60)
CIE-LCH	lch(71.05, 42.79, 264.55°)
OKLab	oklab(74.8% -0.0508 -0.12)
OKLCH	oklch(74.8% 0.13 247)
XYZ	xyz(38.8730, 42.2565, 97.3558)
Luminance	0.4226 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B4FB #FBAA63

analogous

#63FBF6 #63B4FB #6368FB

triadic

#63B4FB #FB63B4 #B4FB63

tetradic

#63B4FB #F663FB #FBAA63 #68FB63

square

#63B4FB #F663FB #FBAA63 #68FB63

split-complementary

#63B4FB #FB6368 #FBF663

monochromatic

#0679DE #2797F9 #63B4FB #9FD1FD #DAEDFE

Accessibility & contrast

On white

2.22

#63B4FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.45

#63B4FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B4FB

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B4FB	#FFFFFF	#000000	##000000
##63B4FB	1.00	2.22	9.45	9.45
#FFFFFF	2.22	1.00	21.00	21.00
#000000	9.45	21.00	1.00	1.00
##000000	9.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B6FE

Deuteranopia (green-blind)

#81A7FA

Tritanopia (blue-blind)

#00C5CD

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #63b4fb;
/* rgb */ color: rgb(99, 180, 251);
/* oklch */ color: oklch(74.8% 0.130 247.0);

Tailwind

colors: {
  custom: {
    50: '#9bcafd',
    500: '#63b4fb',
    950: '#000000',
  },
}

SCSS

$custom: #63b4fb;
$custom-light: #9bcafd;
$custom-dark: #000000;

JSON

{
  "hex": "#63b4fb",
  "rgb": {
    "r": 99,
    "g": 180,
    "b": 251
  },
  "hsl": {
    "h": 208.026,
    "s": 95,
    "l": 68.627
  },
  "oklch": {
    "l": 0.74798,
    "c": 0.13031,
    "h": 247
  },
  "luminance": 0.4226
}

Semantic roles & 50–950 ramp

primary

#63B4FB

secondary

#F4DBC6

accent

#6B00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B4FB

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

Preview Lab → · Contrast checker → · Palette generator →