#63B9F8#63B9F8

#63B9F8 is a light, vivid cyan. Relative luminance 0.441; OKLCH L 75.8% C 0.123 H 242.5°. Best body text is #000000 at 9.83:1 contrast (WCAG AA passes).

Color values

HEX#63B9F8
RGBrgb(99, 185, 248)
HSLhsl(205, 91%, 68%)
HSVhsv(205, 60%, 97%)
CMYKcmyk(60.1%, 25.4%, 0%, 2.7%)
CIE-LABlab(72.31, -7.74, -39.00)
CIE-LCHlch(72.31, 39.76, 258.77°)
OKLaboklab(75.75% -0.0569 -0.1095)
OKLCHoklch(75.75% 0.123 242.5)
XYZxyz(39.4315, 44.1241, 95.2275)
Luminance0.4413 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B9F8 #F8A263
analogous
#63F8EC #63B9F8 #636EF8
triadic
#63B9F8 #F863B9 #B9F863
tetradic
#63B9F8 #EC63F8 #F8A263 #6EF863
square
#63B9F8 #EC63F8 #F8A263 #6EF863
split-complementary
#63B9F8 #F8636E #F8EC63
monochromatic
#0A80D7 #289FF5 #63B9F8 #9ED3FB #D8EEFD

Accessibility & contrast

On white

2.14
#63B9F8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.83
#63B9F8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9F8
9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B9F8#FFFFFF#000000##000000
##63B9F81.002.149.839.83
#FFFFFF2.141.0021.0021.00
#0000009.8321.001.001.00
##0000009.8321.001.001.00

Color blindness preview

Protanopia (red-blind)
#9DBAFB
Deuteranopia (green-blind)
#89ABF7
Tritanopia (blue-blind)
#00C8CF
Achromatopsia (no color)
#B1B1B1

Design tokens & code

CSS
--color: #63b9f8;
/* rgb */ color: rgb(99, 185, 248);
/* oklch */ color: oklch(75.8% 0.123 242.5);
Tailwind
colors: {
  custom: {
    50: '#9bcdfa',
    500: '#63b9f8',
    950: '#000000',
  },
}
SCSS
$custom: #63b9f8;
$custom-light: #9bcdfa;
$custom-dark: #000000;
JSON
{
  "hex": "#63b9f8",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 248
  },
  "hsl": {
    "h": 205.369,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.75753,
    "c": 0.12346,
    "h": 242.5
  },
  "luminance": 0.44128
}

Semantic roles & 50–950 ramp

primary
#63B9F8
secondary
#F2D8C5
accent
#6100E6
background
#FAFCFF
surface
#F4F9FF
border
#CED2D7
text
#0F1317
muted
#7F8285

Preview Lab

Preview with #63B9F8

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

Preview Lab → · Contrast checker → · Palette generator →

#63B9F8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva