#3F73E8#3F73E8

#3F73E8 is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.4% C 0.186 H 263.6°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX#3F73E8
RGBrgb(63, 115, 232)
HSLhsl(222, 79%, 58%)
HSVhsv(222, 73%, 91%)
CMYKcmyk(72.8%, 50.4%, 0%, 9%)
CIE-LABlab(50.85, 22.24, -64.32)
CIE-LCHlch(50.85, 68.06, 289.08°)
OKLaboklab(58.41% -0.0207 -0.185)
OKLCHoklch(58.41% 0.186 263.6)
XYZxyz(22.7409, 19.1419, 78.8245)
Luminance0.1914 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F73E8 #E8B43F
analogous
#3FC8E8 #3F73E8 #5F3FE8
triadic
#3F73E8 #E83F73 #73E83F
tetradic
#3F73E8 #E83FC8 #E8B43F #3FE85F
square
#3F73E8 #E83FC8 #E8B43F #3FE85F
split-complementary
#3F73E8 #E85F3F #C8E83F
monochromatic
#123C9A #1952D1 #3F73E8 #769BEF #ACC3F5

Accessibility & contrast

On white

4.35
#3F73E8 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.83
#3F73E8 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73E8
4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F73E8#FFFFFF#000000##000000
##3F73E81.004.354.834.83
#FFFFFF4.351.0021.0021.00
#0000004.8321.001.001.00
##0000004.8321.001.001.00

Color blindness preview

Protanopia (red-blind)
#2A81EC
Deuteranopia (green-blind)
#0072E6
Tritanopia (blue-blind)
#008FA3
Achromatopsia (no color)
#797979

Design tokens & code

CSS
--color: #3f73e8;
/* rgb */ color: rgb(63, 115, 232);
/* oklch */ color: oklch(58.4% 0.186 263.6);
Tailwind
colors: {
  custom: {
    50: '#899af0',
    500: '#3f73e8',
    950: '#000000',
  },
}
SCSS
$custom: #3f73e8;
$custom-light: #899af0;
$custom-dark: #000000;
JSON
{
  "hex": "#3f73e8",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 232
  },
  "hsl": {
    "h": 221.538,
    "s": 78.605,
    "l": 57.843
  },
  "oklch": {
    "l": 0.58406,
    "c": 0.18611,
    "h": 263.6
  },
  "luminance": 0.19144
}

Semantic roles & 50–950 ramp

primary
#3F73E8
secondary
#E3CEA0
accent
#B933F5
background
#F9F9FE
surface
#F1F2FD
border
#CBCCD5
text
#0D0E17
muted
#7E7E85

Preview Lab

Preview with #3F73E8

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

Preview Lab → · Contrast checker → · Palette generator →

#3F73E8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva