#3F37D3#3F37D3

#3F37D3 is a mid, highly saturated blue. Relative luminance 0.085; OKLCH L 46.2% C 0.227 H 275.1°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX#3F37D3
RGBrgb(63, 55, 211)
HSLhsl(243, 64%, 52%)
HSVhsv(243, 74%, 83%)
CMYKcmyk(70.1%, 73.9%, 0%, 17.3%)
CIE-LABlab(34.98, 51.46, -78.27)
CIE-LCHlch(34.98, 93.67, 303.32°)
OKLaboklab(46.17% 0.02 -0.2263)
OKLCHoklch(46.17% 0.227 275.1)
XYZxyz(15.1701, 8.4908, 62.4548)
Luminance0.0849 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F37D3 #CBD337
analogous
#377DD3 #3F37D3 #8D37D3
triadic
#3F37D3 #D33F37 #37D33F
tetradic
#3F37D3 #D3377D #CBD337 #37D38D
square
#3F37D3 #D3377D #CBD337 #37D38D
split-complementary
#3F37D3 #D38D37 #7DD337
monochromatic
#1F1A76 #2C25A8 #3F37D3 #6F69DE #9F9BE9

Accessibility & contrast

On white

7.78
#3F37D3 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.70
#3F37D3 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37D3
7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F37D3#FFFFFF#000000##FFFFFF
##3F37D31.007.782.707.78
#FFFFFF7.781.0021.001.00
#0000002.7021.001.0021.00
##FFFFFF7.781.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0059D8
Deuteranopia (green-blind)
#004BD0
Tritanopia (blue-blind)
#006482
Achromatopsia (no color)
#525252

Design tokens & code

CSS
--color: #3f37d3;
/* rgb */ color: rgb(63, 55, 211);
/* oklch */ color: oklch(46.2% 0.227 275.1);
Tailwind
colors: {
  custom: {
    50: '#8970e2',
    500: '#3f37d3',
    950: '#000000',
  },
}
SCSS
$custom: #3f37d3;
$custom-light: #8970e2;
$custom-dark: #000000;
JSON
{
  "hex": "#3f37d3",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 211
  },
  "hsl": {
    "h": 243.077,
    "s": 63.934,
    "l": 52.157
  },
  "oklch": {
    "l": 0.46166,
    "c": 0.2272,
    "h": 275.1
  },
  "luminance": 0.08492
}

Semantic roles & 50–950 ramp

primary
#3F37D3
secondary
#D1D591
accent
#E741DE
background
#F9F6FE
surface
#F2ECFC
border
#CCC7D5
text
#0D0816
muted
#7E7B84

Preview Lab

Preview with #3F37D3

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

Preview Lab → · Contrast checker → · Palette generator →

#3F37D3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva