#3F72E8#3F72E8

#3F72E8 is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.2% C 0.187 H 263.9°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX#3F72E8
RGBrgb(63, 114, 232)
HSLhsl(222, 79%, 58%)
HSVhsv(222, 73%, 91%)
CMYKcmyk(72.8%, 50.9%, 0%, 9%)
CIE-LABlab(50.59, 22.87, -64.75)
CIE-LCHlch(50.59, 68.67, 289.45°)
OKLaboklab(58.2% -0.0199 -0.1862)
OKLCHoklch(58.2% 0.187 263.9)
XYZxyz(22.6275, 18.9151, 78.7867)
Luminance0.1892 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F72E8 #E8B53F
analogous
#3FC7E8 #3F72E8 #603FE8
triadic
#3F72E8 #E83F72 #72E83F
tetradic
#3F72E8 #E83FC7 #E8B53F #3FE860
square
#3F72E8 #E83FC7 #E8B53F #3FE860
split-complementary
#3F72E8 #E8603F #C7E83F
monochromatic
#123B9A #1950D1 #3F72E8 #769AEF #ACC2F5

Accessibility & contrast

On white

4.39
#3F72E8 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.78
#3F72E8 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F72E8
4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F72E8#FFFFFF#000000##000000
##3F72E81.004.394.784.78
#FFFFFF4.391.0021.0021.00
#0000004.7821.001.001.00
##0000004.7821.001.001.00

Color blindness preview

Protanopia (red-blind)
#2681EC
Deuteranopia (green-blind)
#0071E6
Tritanopia (blue-blind)
#008EA2
Achromatopsia (no color)
#787878

Design tokens & code

CSS
--color: #3f72e8;
/* rgb */ color: rgb(63, 114, 232);
/* oklch */ color: oklch(58.2% 0.187 263.9);
Tailwind
colors: {
  custom: {
    50: '#8999f0',
    500: '#3f72e8',
    950: '#000000',
  },
}
SCSS
$custom: #3f72e8;
$custom-light: #8999f0;
$custom-dark: #000000;
JSON
{
  "hex": "#3f72e8",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 232
  },
  "hsl": {
    "h": 221.893,
    "s": 78.605,
    "l": 57.843
  },
  "oklch": {
    "l": 0.58204,
    "c": 0.18729,
    "h": 263.9
  },
  "luminance": 0.18918
}

Semantic roles & 50–950 ramp

primary
#3F72E8
secondary
#E3CFA0
accent
#BA33F5
background
#F9F9FE
surface
#F1F2FD
border
#CBCCD5
text
#0D0D17
muted
#7E7E85

Preview Lab

Preview with #3F72E8

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

Preview Lab → · Contrast checker → · Palette generator →

#3F72E8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva