#63B9EB#63B9EB

#63B9EB is a light, moderate cyan. Relative luminance 0.433; OKLCH L 75.2% C 0.110 H 236.3°. Best body text is #000000 at 9.67:1 contrast (WCAG AA passes).

Color values

HEX#63B9EB
RGBrgb(99, 185, 235)
HSLhsl(202, 77%, 65%)
HSVhsv(202, 58%, 92%)
CMYKcmyk(57.9%, 21.3%, 0%, 7.8%)
CIE-LABlab(71.79, -11.73, -32.77)
CIE-LCHlch(71.79, 34.81, 250.31°)
OKLaboklab(75.17% -0.0612 -0.0916)
OKLCHoklch(75.17% 0.11 236.3)
XYZxyz(37.4843, 43.3452, 84.9722)
Luminance0.4335 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B9EB #EB9563
analogous
#63EBD9 #63B9EB #6375EB
triadic
#63B9EB #EB63B9 #B9EB63
tetradic
#63B9EB #D963EB #EB9563 #75EB63
square
#63B9EB #D963EB #EB9563 #75EB63
split-complementary
#63B9EB #EB6375 #EBD963
monochromatic
#187FBC #2DA1E4 #63B9EB #99D1F2 #CFEAF9

Accessibility & contrast

On white

2.17
#63B9EB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.67
#63B9EB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9EB
9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B9EB#FFFFFF#000000##000000
##63B9EB1.002.179.679.67
#FFFFFF2.171.0021.0021.00
#0000009.6721.001.001.00
##0000009.6721.001.001.00

Color blindness preview

Protanopia (red-blind)
#A2B8ED
Deuteranopia (green-blind)
#8FAAEA
Tritanopia (blue-blind)
#00C6CA
Achromatopsia (no color)
#B0B0B0

Design tokens & code

CSS
--color: #63b9eb;
/* rgb */ color: rgb(99, 185, 235);
/* oklch */ color: oklch(75.2% 0.110 236.3);
Tailwind
colors: {
  custom: {
    50: '#9acef1',
    500: '#63b9eb',
    950: '#000000',
  },
}
SCSS
$custom: #63b9eb;
$custom-light: #9acef1;
$custom-dark: #000000;
JSON
{
  "hex": "#63b9eb",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 235
  },
  "hsl": {
    "h": 202.059,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.75167,
    "c": 0.11017,
    "h": 236.3
  },
  "luminance": 0.43349
}

Semantic roles & 50–950 ramp

primary
#63B9EB
secondary
#ECCFBE
accent
#580CDA
background
#FAFCFE
surface
#F3F9FD
border
#CDD2D5
text
#0F1316
muted
#7F8284

Preview Lab

Preview with #63B9EB

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

Preview Lab → · Contrast checker → · Palette generator →

#63B9EB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva