#63B5F5#63B5F5

#63B5F5 is a light, vivid cyan. Relative luminance 0.423; OKLCH L 74.7% C 0.123 H 244.1°. Best body text is #000000 at 9.46:1 contrast (WCAG AA passes).

Color values

HEX#63B5F5
RGBrgb(99, 181, 245)
HSLhsl(206, 88%, 67%)
HSVhsv(206, 60%, 96%)
CMYKcmyk(59.6%, 26.1%, 0%, 3.9%)
CIE-LABlab(71.07, -6.49, -39.31)
CIE-LCHlch(71.07, 39.85, 260.62°)
OKLaboklab(74.73% -0.0537 -0.1105)
OKLCHoklch(74.73% 0.123 244.1)
XYZxyz(38.1448, 42.2894, 92.5210)
Luminance0.4229 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B5F5 #F5A363
analogous
#63F5EC #63B5F5 #636CF5
triadic
#63B5F5 #F563B5 #B5F563
tetradic
#63B5F5 #EC63F5 #F5A363 #6CF563
square
#63B5F5 #EC63F5 #F5A363 #6CF563
split-complementary
#63B5F5 #F5636C #F5EC63
monochromatic
#0D7BD0 #299AF1 #63B5F5 #9DD0F9 #D6ECFC

Accessibility & contrast

On white

2.22
#63B5F5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.46
#63B5F5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5F5
9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B5F5#FFFFFF#000000##000000
##63B5F51.002.229.469.46
#FFFFFF2.221.0021.0021.00
#0000009.4621.001.001.00
##0000009.4621.001.001.00

Color blindness preview

Protanopia (red-blind)
#99B6F8
Deuteranopia (green-blind)
#85A7F4
Tritanopia (blue-blind)
#00C4CB
Achromatopsia (no color)
#AEAEAE

Design tokens & code

CSS
--color: #63b5f5;
/* rgb */ color: rgb(99, 181, 245);
/* oklch */ color: oklch(74.7% 0.123 244.1);
Tailwind
colors: {
  custom: {
    50: '#9bcbf8',
    500: '#63b5f5',
    950: '#000000',
  },
}
SCSS
$custom: #63b5f5;
$custom-light: #9bcbf8;
$custom-dark: #000000;
JSON
{
  "hex": "#63b5f5",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 245
  },
  "hsl": {
    "h": 206.301,
    "s": 87.952,
    "l": 67.451
  },
  "oklch": {
    "l": 0.74731,
    "c": 0.12283,
    "h": 244.1
  },
  "luminance": 0.42293
}

Semantic roles & 50–950 ramp

primary
#63B5F5
secondary
#F1D7C3
accent
#6501E5
background
#FAFCFF
surface
#F4F8FF
border
#CED1D7
text
#0F1317
muted
#7F8285

Preview Lab

Preview with #63B5F5

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

Preview Lab → · Contrast checker → · Palette generator →

#63B5F5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva