#638EF1#638EF1

#638EF1 is a light, vivid blue. Relative luminance 0.283; OKLCH L 66.2% C 0.155 H 264.8°. Best body text is #000000 at 6.67:1 contrast (WCAG AA passes).

Color values

HEX#638EF1
RGBrgb(99, 142, 241)
HSLhsl(222, 84%, 67%)
HSVhsv(222, 59%, 95%)
CMYKcmyk(58.9%, 41.1%, 0%, 5.5%)
CIE-LABlab(60.20, 14.57, -54.25)
CIE-LCHlch(60.20, 56.17, 285.04°)
OKLaboklab(66.18% -0.014 -0.1543)
OKLCHoklch(66.18% 0.155 264.8)
XYZxyz(30.6903, 28.3469, 87.0562)
Luminance0.2835 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#638EF1 #F1C663
analogous
#63D5F1 #638EF1 #7F63F1
triadic
#638EF1 #F1638E #8EF163
tetradic
#638EF1 #F163D5 #F1C663 #63F17F
square
#638EF1 #F163D5 #F1C663 #63F17F
split-complementary
#638EF1 #F17F63 #D5F163
monochromatic
#1249C8 #2B65EC #638EF1 #9BB7F6 #D3DFFB

Accessibility & contrast

On white

3.15
#638EF1 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.67
#638EF1 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EF1
6.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##638EF1#FFFFFF#000000##000000
##638EF11.003.156.676.67
#FFFFFF3.151.0021.0021.00
#0000006.6721.001.001.00
##0000006.6721.001.001.00

Color blindness preview

Protanopia (red-blind)
#6398F5
Deuteranopia (green-blind)
#4F8BEF
Tritanopia (blue-blind)
#00A4B4
Achromatopsia (no color)
#919191

Design tokens & code

CSS
--color: #638ef1;
/* rgb */ color: rgb(99, 142, 241);
/* oklch */ color: oklch(66.2% 0.155 264.8);
Tailwind
colors: {
  custom: {
    50: '#9aaef6',
    500: '#638ef1',
    950: '#000000',
  },
}
SCSS
$custom: #638ef1;
$custom-light: #9aaef6;
$custom-dark: #000000;
JSON
{
  "hex": "#638ef1",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 241
  },
  "hsl": {
    "h": 221.831,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.66182,
    "c": 0.15496,
    "h": 264.8
  },
  "luminance": 0.2835
}

Semantic roles & 50–950 ramp

primary
#638EF1
secondary
#EFE1C1
accent
#9E06E0
background
#FAFAFF
surface
#F3F4FE
border
#CDCED6
text
#0F1017
muted
#7F7F85

Preview Lab

Preview with #638EF1

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

Preview Lab → · Contrast checker → · Palette generator →

#638EF1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva