#63B4FD#63B4FD

#63B4FD is a light, vivid cyan. Relative luminance 0.424; OKLCH L 74.9% C 0.133 H 247.7°. Best body text is #000000 at 9.48:1 contrast (WCAG AA passes).

Color values

HEX#63B4FD
RGBrgb(99, 180, 253)
HSLhsl(208, 97%, 69%)
HSVhsv(208, 61%, 99%)
CMYKcmyk(60.9%, 28.9%, 0%, 0.8%)
CIE-LABlab(71.13, -3.43, -43.54)
CIE-LCHlch(71.13, 43.68, 265.49°)
OKLaboklab(74.9% -0.0503 -0.1227)
OKLCHoklch(74.9% 0.133 247.7)
XYZxyz(39.1899, 42.3833, 99.0250)
Luminance0.4239 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B4FD #FDAC63
analogous
#63FDF9 #63B4FD #6367FD
triadic
#63B4FD #FD63B4 #B4FD63
tetradic
#63B4FD #F963FD #FDAC63 #67FD63
square
#63B4FD #F963FD #FDAC63 #67FD63
split-complementary
#63B4FD #FD6367 #FDF963
monochromatic
#0379E3 #2797FC #63B4FD #9FD1FE #DCEEFF

Accessibility & contrast

On white

2.22
#63B4FD on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.48
#63B4FD on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B4FD
9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B4FD#FFFFFF#000000##000000
##63B4FD1.002.229.489.48
#FFFFFF2.221.0021.0021.00
#0000009.4821.001.001.00
##0000009.4821.001.001.00

Color blindness preview

Protanopia (red-blind)
#94B6FF
Deuteranopia (green-blind)
#80A7FC
Tritanopia (blue-blind)
#00C5CE
Achromatopsia (no color)
#AEAEAE

Design tokens & code

CSS
--color: #63b4fd;
/* rgb */ color: rgb(99, 180, 253);
/* oklch */ color: oklch(74.9% 0.133 247.7);
Tailwind
colors: {
  custom: {
    50: '#9ccafe',
    500: '#63b4fd',
    950: '#000000',
  },
}
SCSS
$custom: #63b4fd;
$custom-light: #9ccafe;
$custom-dark: #000000;
JSON
{
  "hex": "#63b4fd",
  "rgb": {
    "r": 99,
    "g": 180,
    "b": 253
  },
  "hsl": {
    "h": 208.442,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.74895,
    "c": 0.13261,
    "h": 247.7
  },
  "luminance": 0.42387
}

Semantic roles & 50–950 ramp

primary
#63B4FD
secondary
#F4DDC7
accent
#6D00E6
background
#FAFCFF
surface
#F4F8FF
border
#CED1D7
text
#0F1318
muted
#7F8286

Preview Lab

Preview with #63B4FD

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

Preview Lab → · Contrast checker → · Palette generator →

#63B4FD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva