#3F73D9#3F73D9

#3F73D9 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.4% C 0.166 H 262.2°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX#3F73D9
RGBrgb(63, 115, 217)
HSLhsl(220, 67%, 55%)
HSVhsv(220, 71%, 85%)
CMYKcmyk(71%, 47%, 0%, 14.9%)
CIE-LABlab(49.89, 16.82, -57.42)
CIE-LCHlch(49.89, 59.83, 286.33°)
OKLaboklab(57.36% -0.0226 -0.1646)
OKLCHoklch(57.36% 0.166 262.2)
XYZxyz(20.7006, 18.3258, 68.0785)
Luminance0.1833 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F73D9 #D9A53F
analogous
#3FC0D9 #3F73D9 #583FD9
triadic
#3F73D9 #D93F73 #73D93F
tetradic
#3F73D9 #D93FC0 #D9A53F #3FD958
square
#3F73D9 #D93FC0 #D9A53F #3FD958
split-complementary
#3F73D9 #D9583F #C0D93F
monochromatic
#1A3E84 #2456B7 #3F73D9 #7298E3 #A5BEED

Accessibility & contrast

On white

4.50
#3F73D9 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.67
#3F73D9 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73D9
4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F73D9#FFFFFF#000000##000000
##3F73D91.004.504.674.67
#FFFFFF4.501.0021.0021.00
#0000004.6721.001.001.00
##0000004.6721.001.001.00

Color blindness preview

Protanopia (red-blind)
#3C7EDD
Deuteranopia (green-blind)
#1570D7
Tritanopia (blue-blind)
#008B9B
Achromatopsia (no color)
#777777

Design tokens & code

CSS
--color: #3f73d9;
/* rgb */ color: rgb(63, 115, 217);
/* oklch */ color: oklch(57.4% 0.166 262.2);
Tailwind
colors: {
  custom: {
    50: '#869ae5',
    500: '#3f73d9',
    950: '#000000',
  },
}
SCSS
$custom: #3f73d9;
$custom-light: #869ae5;
$custom-dark: #000000;
JSON
{
  "hex": "#3f73d9",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 217
  },
  "hsl": {
    "h": 219.74,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.57361,
    "c": 0.16619,
    "h": 262.2
  },
  "luminance": 0.18328
}

Semantic roles & 50–950 ramp

primary
#3F73D9
secondary
#DAC49A
accent
#B03EEA
background
#F8F9FE
surface
#F0F2FC
border
#CBCCD5
text
#0D0E16
muted
#7D7E84

Preview Lab

Preview with #3F73D9

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

Preview Lab → · Contrast checker → · Palette generator →

#3F73D9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva