#63B3FD#63B3FD

#63B3FD is a light, vivid cyan. Relative luminance 0.420; OKLCH L 74.7% C 0.133 H 248.3°. Best body text is #000000 at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#63B3FD
RGB	rgb(99, 179, 253)
HSL	hsl(209, 97%, 69%)
HSV	hsv(209, 61%, 99%)
CMYK	cmyk(60.9%, 29.2%, 0%, 0.8%)
CIE-LAB	lab(70.86, -2.88, -43.97)
CIE-LCH	lch(70.86, 44.07, 266.26°)
OKLab	oklab(74.68% -0.0492 -0.124)
OKLCH	oklch(74.68% 0.133 248.3)
XYZ	xyz(38.9888, 41.9810, 98.9579)
Luminance	0.4199 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B3FD #FDAD63

analogous

#63FDFA #63B3FD #6366FD

triadic

#63B3FD #FD63B3 #B3FD63

tetradic

#63B3FD #FA63FD #FDAD63 #66FD63

square

#63B3FD #FA63FD #FDAD63 #66FD63

split-complementary

#63B3FD #FD6366 #FDFA63

monochromatic

#0377E3 #2796FC #63B3FD #9FD0FE #DCEEFF

Accessibility & contrast

On white

2.23

#63B3FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.40

#63B3FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B3FD

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B3FD	#FFFFFF	#000000	##000000
##63B3FD	1.00	2.23	9.40	9.40
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.40	21.00	1.00	1.00
##000000	9.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#93B6FF

Deuteranopia (green-blind)

#7EA7FC

Tritanopia (blue-blind)

#00C4CD

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #63b3fd;
/* rgb */ color: rgb(99, 179, 253);
/* oklch */ color: oklch(74.7% 0.133 248.3);

Tailwind

colors: {
  custom: {
    50: '#9cc9fe',
    500: '#63b3fd',
    950: '#000000',
  },
}

SCSS

$custom: #63b3fd;
$custom-light: #9cc9fe;
$custom-dark: #000000;

JSON

{
  "hex": "#63b3fd",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 253
  },
  "hsl": {
    "h": 208.831,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.74677,
    "c": 0.1334,
    "h": 248.3
  },
  "luminance": 0.41985
}

Semantic roles & 50–950 ramp

primary

#63B3FD

secondary

#F4DDC7

accent

#6E00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #63B3FD

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

Preview Lab → · Contrast checker → · Palette generator →