#63BBFB#63BBFB

#63BBFB is a light, vivid cyan. Relative luminance 0.452; OKLCH L 76.3% C 0.125 H 242.4°. Best body text is #000000 at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#63BBFB
RGB	rgb(99, 187, 251)
HSL	hsl(205, 95%, 69%)
HSV	hsv(205, 61%, 98%)
CMYK	cmyk(60.6%, 25.5%, 0%, 1.6%)
CIE-LAB	lab(72.99, -7.90, -39.56)
CIE-LCH	lch(72.99, 40.34, 258.71°)
OKLab	oklab(76.33% -0.0581 -0.1111)
OKLCH	oklch(76.33% 0.125 242.4)
XYZ	xyz(40.3220, 45.1545, 97.8388)
Luminance	0.4516 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63BBFB #FBA363

analogous

#63FBEF #63BBFB #636FFB

triadic

#63BBFB #FB63BB #BBFB63

tetradic

#63BBFB #EF63FB #FBA363 #6FFB63

square

#63BBFB #EF63FB #FBA363 #6FFB63

split-complementary

#63BBFB #FB636F #FBEF63

monochromatic

#0683DE #27A1F9 #63BBFB #9FD5FD #DAEFFE

Accessibility & contrast

On white

2.09

#63BBFB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.03

#63BBFB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63BBFB

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63BBFB	#FFFFFF	#000000	##000000
##63BBFB	1.00	2.09	10.03	10.03
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.03	21.00	1.00	1.00
##000000	10.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FBCFE

Deuteranopia (green-blind)

#8AACFA

Tritanopia (blue-blind)

#00CBD1

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #63bbfb;
/* rgb */ color: rgb(99, 187, 251);
/* oklch */ color: oklch(76.3% 0.125 242.4);

Tailwind

colors: {
  custom: {
    50: '#9ccffd',
    500: '#63bbfb',
    950: '#000000',
  },
}

SCSS

$custom: #63bbfb;
$custom-light: #9ccffd;
$custom-dark: #000000;

JSON

{
  "hex": "#63bbfb",
  "rgb": {
    "r": 99,
    "g": 187,
    "b": 251
  },
  "hsl": {
    "h": 205.263,
    "s": 95,
    "l": 68.627
  },
  "oklch": {
    "l": 0.76334,
    "c": 0.1254,
    "h": 242.4
  },
  "luminance": 0.45158
}

Semantic roles & 50–950 ramp

primary

#63BBFB

secondary

#F4D9C6

accent

#6100E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63BBFB

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

Preview Lab → · Contrast checker → · Palette generator →