#3F31AD#3F31AD

#3F31AD is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.6% C 0.187 H 279.5°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX#3F31AD
RGBrgb(63, 49, 173)
HSLhsl(247, 56%, 44%)
HSVhsv(247, 72%, 68%)
CMYKcmyk(63.6%, 71.7%, 0%, 32.2%)
CIE-LABlab(30.08, 42.71, -63.99)
CIE-LCHlch(30.08, 76.94, 303.72°)
OKLaboklab(41.57% 0.031 -0.1846)
OKLCHoklch(41.57% 0.187 279.5)
XYZxyz(10.6886, 6.2697, 40.1740)
Luminance0.0627 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F31AD #9FAD31
analogous
#3161AD #3F31AD #7D31AD
triadic
#3F31AD #AD3F31 #31AD3F
tetradic
#3F31AD #AD3161 #9FAD31 #31AD7D
square
#3F31AD #AD3161 #9FAD31 #31AD7D
split-complementary
#3F31AD #AD7D31 #61AD31
monochromatic
#1C164E #2E237D #3F31AD #5D4ECD #887EDA

Accessibility & contrast

On white

9.32
#3F31AD on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.25
#3F31AD on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F31AD
9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F31AD#FFFFFF#000000##FFFFFF
##3F31AD1.009.322.259.32
#FFFFFF9.321.0021.001.00
#0000002.2521.001.0021.00
##FFFFFF9.321.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004BB1
Deuteranopia (green-blind)
#0042AB
Tritanopia (blue-blind)
#00536B
Achromatopsia (no color)
#474747

Design tokens & code

CSS
--color: #3f31ad;
/* rgb */ color: rgb(63, 49, 173);
/* oklch */ color: oklch(41.6% 0.187 279.5);
Tailwind
colors: {
  custom: {
    50: '#826bc7',
    500: '#3f31ad',
    950: '#000000',
  },
}
SCSS
$custom: #3f31ad;
$custom-light: #826bc7;
$custom-dark: #000000;
JSON
{
  "hex": "#3f31ad",
  "rgb": {
    "r": 63,
    "g": 49,
    "b": 173
  },
  "hsl": {
    "h": 246.774,
    "s": 55.856,
    "l": 43.529
  },
  "oklch": {
    "l": 0.41566,
    "c": 0.18721,
    "h": 279.5
  },
  "luminance": 0.06271
}

Semantic roles & 50–950 ramp

primary
#3F31AD
secondary
#BBC377
accent
#DF49CE
background
#F8F6FC
surface
#F0EBF8
border
#CBC6D1
text
#0C0713
muted
#7D7A82

Preview Lab

Preview with #3F31AD

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

Preview Lab → · Contrast checker → · Palette generator →

#3F31AD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva