#3F37D8#3F37D8

#3F37D8 is a mid, highly saturated blue. Relative luminance 0.087; OKLCH L 46.7% C 0.233 H 274.7°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX#3F37D8
RGBrgb(63, 55, 216)
HSLhsl(243, 67%, 53%)
HSVhsv(243, 75%, 85%)
CMYKcmyk(70.8%, 74.5%, 0%, 15.3%)
CIE-LABlab(35.49, 53.02, -80.32)
CIE-LCHlch(35.49, 96.24, 303.43°)
OKLaboklab(46.67% 0.019 -0.2323)
OKLCHoklch(46.67% 0.233 274.7)
XYZxyz(15.8067, 8.7455, 65.8075)
Luminance0.0875 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F37D8 #D0D837
analogous
#3780D8 #3F37D8 #8F37D8
triadic
#3F37D8 #D83F37 #37D83F
tetradic
#3F37D8 #D83780 #D0D837 #37D88F
square
#3F37D8 #D83780 #D0D837 #37D88F
split-complementary
#3F37D8 #D88F37 #80D837
monochromatic
#1D187C #2922B0 #3F37D8 #706AE2 #A19DEC

Accessibility & contrast

On white

7.64
#3F37D8 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.75
#3F37D8 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37D8
7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F37D8#FFFFFF#000000##FFFFFF
##3F37D81.007.642.757.64
#FFFFFF7.641.0021.001.00
#0000002.7521.001.0021.00
##FFFFFF7.641.0021.001.00

Color blindness preview

Protanopia (red-blind)
#005BDD
Deuteranopia (green-blind)
#004CD5
Tritanopia (blue-blind)
#006685
Achromatopsia (no color)
#535353

Design tokens & code

CSS
--color: #3f37d8;
/* rgb */ color: rgb(63, 55, 216);
/* oklch */ color: oklch(46.7% 0.233 274.7);
Tailwind
colors: {
  custom: {
    50: '#8a70e5',
    500: '#3f37d8',
    950: '#000000',
  },
}
SCSS
$custom: #3f37d8;
$custom-light: #8a70e5;
$custom-dark: #000000;
JSON
{
  "hex": "#3f37d8",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 216
  },
  "hsl": {
    "h": 242.981,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.46674,
    "c": 0.23307,
    "h": 274.7
  },
  "luminance": 0.08747
}

Semantic roles & 50–950 ramp

primary
#3F37D8
secondary
#D5D893
accent
#EA3EE2
background
#F9F6FE
surface
#F2ECFC
border
#CCC7D5
text
#0E0816
muted
#7E7B84

Preview Lab

Preview with #3F37D8

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

Preview Lab → · Contrast checker → · Palette generator →

#3F37D8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva