#3921B4#3921B4

#3921B4 is a dark, highly saturated blue. Relative luminance 0.053; OKLCH L 39.8% C 0.212 H 278.1°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX#3921B4
RGBrgb(57, 33, 180)
HSLhsl(250, 69%, 42%)
HSVhsv(250, 82%, 71%)
CMYKcmyk(68.3%, 81.7%, 0%, 29.4%)
CIE-LABlab(27.44, 52.42, -72.55)
CIE-LCHlch(27.44, 89.51, 305.85°)
OKLaboklab(39.8% 0.03 -0.2096)
OKLCHoklch(39.8% 0.212 278.1)
XYZxyz(10.4668, 5.2519, 43.6333)
Luminance0.0525 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3921B4 #9CB421
analogous
#2153B4 #3921B4 #8321B4
triadic
#3921B4 #B43921 #21B439
tetradic
#3921B4 #B42153 #9CB421 #21B483
square
#3921B4 #B42153 #9CB421 #21B483
split-complementary
#3921B4 #B48321 #53B421
monochromatic
#180E4D #291880 #3921B4 #5238DA #7F6BE4

Accessibility & contrast

On white

10.24
#3921B4 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.05
#3921B4 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3921B4
10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3921B4#FFFFFF#000000##FFFFFF
##3921B41.0010.242.0510.24
#FFFFFF10.241.0021.001.00
#0000002.0521.001.0021.00
##FFFFFF10.241.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0046B8
Deuteranopia (green-blind)
#003BB1
Tritanopia (blue-blind)
#004F6C
Achromatopsia (no color)
#414141

Design tokens & code

CSS
--color: #3921b4;
/* rgb */ color: rgb(57, 33, 180);
/* oklch */ color: oklch(39.8% 0.212 278.1);
Tailwind
colors: {
  custom: {
    50: '#8262cc',
    500: '#3921b4',
    950: '#000000',
  },
}
SCSS
$custom: #3921b4;
$custom-light: #8262cc;
$custom-dark: #000000;
JSON
{
  "hex": "#3921b4",
  "rgb": {
    "r": 57,
    "g": 33,
    "b": 180
  },
  "hsl": {
    "h": 249.796,
    "s": 69.014,
    "l": 41.765
  },
  "oklch": {
    "l": 0.39803,
    "c": 0.21172,
    "h": 278.1
  },
  "luminance": 0.05253
}

Semantic roles & 50–950 ramp

primary
#3921B4
secondary
#BACA67
accent
#EC3CCF
background
#F8F6FC
surface
#F0EBF9
border
#CBC6D2
text
#0C0514
muted
#7D7A82

Preview Lab

Preview with #3921B4

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

Preview Lab → · Contrast checker → · Palette generator →

#3921B4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva