#311BB4#311BB4

#311BB4 is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.6% C 0.218 H 275.5°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX#311BB4
RGBrgb(49, 27, 180)
HSLhsl(249, 74%, 41%)
HSVhsv(249, 85%, 71%)
CMYKcmyk(72.8%, 85%, 0%, 29.4%)
CIE-LABlab(25.95, 54.37, -75.04)
CIE-LCHlch(25.95, 92.66, 305.92°)
OKLaboklab(38.62% 0.0208 -0.2169)
OKLCHoklch(38.62% 0.218 275.5)
XYZxyz(9.8941, 4.7312, 43.5629)
Luminance0.0473 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#311BB4 #9EB41B
analogous
#1B52B4 #311BB4 #7D1BB4
triadic
#311BB4 #B4311B #1BB431
tetradic
#311BB4 #B41B52 #9EB41B #1BB47D
square
#311BB4 #B41B52 #9EB41B #1BB47D
split-complementary
#311BB4 #B47D1B #52B41B
monochromatic
#140B4A #23137F #311BB4 #462DDF #7562E7

Accessibility & contrast

On white

10.79
#311BB4 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.95
#311BB4 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311BB4
10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##311BB4#FFFFFF#000000##FFFFFF
##311BB41.0010.791.9510.79
#FFFFFF10.791.0021.001.00
#0000001.9521.001.0021.00
##FFFFFF10.791.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0044B8
Deuteranopia (green-blind)
#0037B1
Tritanopia (blue-blind)
#004D6B
Achromatopsia (no color)
#3D3D3D

Design tokens & code

CSS
--color: #311bb4;
/* rgb */ color: rgb(49, 27, 180);
/* oklch */ color: oklch(38.6% 0.218 275.5);
Tailwind
colors: {
  custom: {
    50: '#7f5ecc',
    500: '#311bb4',
    950: '#000000',
  },
}
SCSS
$custom: #311bb4;
$custom-light: #7f5ecc;
$custom-dark: #000000;
JSON
{
  "hex": "#311bb4",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 180
  },
  "hsl": {
    "h": 248.627,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.38622,
    "c": 0.21785,
    "h": 275.5
  },
  "luminance": 0.04732
}

Semantic roles & 50–950 ramp

primary
#311BB4
secondary
#BCCC5F
accent
#F137D6
background
#F8F5FC
surface
#F0E9F9
border
#CBC5D2
text
#0C0514
muted
#7D7982

Preview Lab

Preview with #311BB4

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

Preview Lab → · Contrast checker → · Palette generator →

#311BB4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva