#63B9E8#63B9E8

#63B9E8 is a light, moderate cyan. Relative luminance 0.432; OKLCH L 75.0% C 0.107 H 234.6°. Best body text is #000000 at 9.64:1 contrast (WCAG AA passes).

Color values

HEX#63B9E8
RGBrgb(99, 185, 232)
HSLhsl(201, 74%, 65%)
HSVhsv(201, 57%, 91%)
CMYKcmyk(57.3%, 20.3%, 0%, 9%)
CIE-LABlab(71.67, -12.64, -31.33)
CIE-LCHlch(71.67, 33.78, 248.03°)
OKLaboklab(75.04% -0.0622 -0.0875)
OKLCHoklch(75.04% 0.107 234.6)
XYZxyz(37.0545, 43.1733, 82.7088)
Luminance0.4318 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B9E8 #E89263
analogous
#63E8D5 #63B9E8 #6376E8
triadic
#63B9E8 #E863B9 #B9E863
tetradic
#63B9E8 #D563E8 #E89263 #76E863
square
#63B9E8 #D563E8 #E89263 #76E863
split-complementary
#63B9E8 #E86376 #E8D563
monochromatic
#1B7FB6 #2EA1E0 #63B9E8 #98D1F0 #CEE9F8

Accessibility & contrast

On white

2.18
#63B9E8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.64
#63B9E8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9E8
9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B9E8#FFFFFF#000000##000000
##63B9E81.002.189.649.64
#FFFFFF2.181.0021.0021.00
#0000009.6421.001.001.00
##0000009.6421.001.001.00

Color blindness preview

Protanopia (red-blind)
#A3B7EA
Deuteranopia (green-blind)
#90AAE7
Tritanopia (blue-blind)
#00C5C9
Achromatopsia (no color)
#B0B0B0

Design tokens & code

CSS
--color: #63b9e8;
/* rgb */ color: rgb(99, 185, 232);
/* oklch */ color: oklch(75.0% 0.107 234.6);
Tailwind
colors: {
  custom: {
    50: '#99ceef',
    500: '#63b9e8',
    950: '#000000',
  },
}
SCSS
$custom: #63b9e8;
$custom-light: #99ceef;
$custom-dark: #000000;
JSON
{
  "hex": "#63b9e8",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 232
  },
  "hsl": {
    "h": 201.203,
    "s": 74.302,
    "l": 64.902
  },
  "oklch": {
    "l": 0.75036,
    "c": 0.10734,
    "h": 234.6
  },
  "luminance": 0.43177
}

Semantic roles & 50–950 ramp

primary
#63B9E8
secondary
#EACDBD
accent
#560FD6
background
#FAFCFE
surface
#F3F9FD
border
#CDD2D5
text
#0F1316
muted
#7F8284

Preview Lab

Preview with #63B9E8

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

Preview Lab → · Contrast checker → · Palette generator →

#63B9E8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva