#638BF1#638BF1

#638BF1 is a light, vivid blue. Relative luminance 0.275; OKLCH L 65.6% C 0.158 H 266.0°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX#638BF1
RGBrgb(99, 139, 241)
HSLhsl(223, 84%, 67%)
HSVhsv(223, 59%, 95%)
CMYKcmyk(58.9%, 42.3%, 0%, 5.5%)
CIE-LABlab(59.40, 16.36, -55.52)
CIE-LCHlch(59.40, 57.88, 286.42°)
OKLaboklab(65.57% -0.0109 -0.1581)
OKLCHoklch(65.57% 0.158 266)
XYZxyz(30.2500, 27.4662, 86.9094)
Luminance0.2747 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#638BF1 #F1C963
analogous
#63D2F1 #638BF1 #8263F1
triadic
#638BF1 #F1638B #8BF163
tetradic
#638BF1 #F163D2 #F1C963 #63F182
square
#638BF1 #F163D2 #F1C963 #63F182
split-complementary
#638BF1 #F18263 #D2F163
monochromatic
#1245C8 #2B61EC #638BF1 #9BB5F6 #D3DFFB

Accessibility & contrast

On white

3.23
#638BF1 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.49
#638BF1 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BF1
6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##638BF1#FFFFFF#000000##000000
##638BF11.003.236.496.49
#FFFFFF3.231.0021.0021.00
#0000006.4921.001.001.00
##0000006.4921.001.001.00

Color blindness preview

Protanopia (red-blind)
#5D96F5
Deuteranopia (green-blind)
#4989EF
Tritanopia (blue-blind)
#00A2B2
Achromatopsia (no color)
#8F8F8F

Design tokens & code

CSS
--color: #638bf1;
/* rgb */ color: rgb(99, 139, 241);
/* oklch */ color: oklch(65.6% 0.158 266.0);
Tailwind
colors: {
  custom: {
    50: '#9aacf6',
    500: '#638bf1',
    950: '#000000',
  },
}
SCSS
$custom: #638bf1;
$custom-light: #9aacf6;
$custom-dark: #000000;
JSON
{
  "hex": "#638bf1",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 241
  },
  "hsl": {
    "h": 223.099,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.65569,
    "c": 0.15846,
    "h": 266
  },
  "luminance": 0.27469
}

Semantic roles & 50–950 ramp

primary
#638BF1
secondary
#EFE2C1
accent
#A206E0
background
#FAFAFF
surface
#F3F4FE
border
#CDCED6
text
#0F1017
muted
#7F7F85

Preview Lab

Preview with #638BF1

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

Preview Lab → · Contrast checker → · Palette generator →

#638BF1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva