#638BFD#638BFD

#638BFD is a light, vivid blue. Relative luminance 0.282; OKLCH L 66.3% C 0.175 H 267.0°. Best body text is #000000 at 6.64:1 contrast (WCAG AA passes).

Color values

HEX#638BFD
RGBrgb(99, 139, 253)
HSLhsl(224, 97%, 69%)
HSVhsv(224, 61%, 99%)
CMYKcmyk(60.9%, 45.1%, 0%, 0.8%)
CIE-LABlab(60.08, 20.29, -61.05)
CIE-LCHlch(60.08, 64.34, 288.39°)
OKLaboklab(66.3% -0.009 -0.1743)
OKLCHoklch(66.3% 0.175 267)
XYZxyz(32.1018, 28.2070, 96.6622)
Luminance0.2821 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#638BFD #FDD563
analogous
#63D8FD #638BFD #8863FD
triadic
#638BFD #FD638B #8BFD63
tetradic
#638BFD #FD63D8 #FDD563 #63FD88
square
#638BFD #FD63D8 #FDD563 #63FD88
split-complementary
#638BFD #FD8863 #D8FD63
monochromatic
#033DE3 #275EFC #638BFD #9FB8FE #DCE5FF

Accessibility & contrast

On white

3.16
#638BFD on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.64
#638BFD on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BFD
6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##638BFD#FFFFFF#000000##000000
##638BFD1.003.166.646.64
#FFFFFF3.161.0021.0021.00
#0000006.6421.001.001.00
##0000006.6421.001.001.00

Color blindness preview

Protanopia (red-blind)
#5498FF
Deuteranopia (green-blind)
#3B8AFB
Tritanopia (blue-blind)
#00A5B8
Achromatopsia (no color)
#919191

Design tokens & code

CSS
--color: #638bfd;
/* rgb */ color: rgb(99, 139, 253);
/* oklch */ color: oklch(66.3% 0.175 267.0);
Tailwind
colors: {
  custom: {
    50: '#9cacff',
    500: '#638bfd',
    950: '#000000',
  },
}
SCSS
$custom: #638bfd;
$custom-light: #9cacff;
$custom-dark: #000000;
JSON
{
  "hex": "#638bfd",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 253
  },
  "hsl": {
    "h": 224.416,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.66301,
    "c": 0.17457,
    "h": 267
  },
  "luminance": 0.2821
}

Semantic roles & 50–950 ramp

primary
#638BFD
secondary
#F4E9C7
accent
#AA00E6
background
#FAFAFF
surface
#F4F4FF
border
#CECED7
text
#0F1018
muted
#7F7F86

Preview Lab

Preview with #638BFD

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

Preview Lab → · Contrast checker → · Palette generator →

#638BFD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva