#181B8D#181B8D

#181B8D is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.179 H 269.8°. Best body text is #FFFFFF at 13.29:1 contrast (WCAG AA passes).

Color values

HEX#181B8D
RGBrgb(24, 27, 141)
HSLhsl(238, 71%, 32%)
HSVhsv(238, 83%, 55%)
CMYKcmyk(83%, 80.9%, 0%, 44.7%)
CIE-LABlab(19.64, 40.64, -61.77)
CIE-LCHlch(19.64, 73.94, 303.35°)
OKLaboklab(32.47% -0.0007 -0.1789)
OKLCHoklch(32.47% 0.179 269.8)
XYZxyz(5.5747, 2.9005, 25.4602)
Luminance0.0290 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#181B8D #8D8A18
analogous
#18558D #181B8D #50188D
triadic
#181B8D #8D181B #1B8D18
tetradic
#181B8D #8D1855 #8D8A18 #188D50
square
#181B8D #8D1855 #8D8A18 #188D50
split-complementary
#181B8D #8D5018 #558D18
monochromatic
#060724 #0F1159 #181B8D #2125C1 #4145DF

Accessibility & contrast

On white

13.29
#181B8D on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.58
#181B8D on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B8D
13.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##181B8D#FFFFFF#000000##FFFFFF
##181B8D1.0013.291.5813.29
#FFFFFF13.291.0021.001.00
#0000001.5821.001.0021.00
##FFFFFF13.291.0021.001.00

Color blindness preview

Protanopia (red-blind)
#003590
Deuteranopia (green-blind)
#00298B
Tritanopia (blue-blind)
#003E54
Achromatopsia (no color)
#303030

Design tokens & code

CSS
--color: #181b8d;
/* rgb */ color: rgb(24, 27, 141);
/* oklch */ color: oklch(32.5% 0.179 269.8);
Tailwind
colors: {
  custom: {
    50: '#6d5ab0',
    500: '#181b8d',
    950: '#000000',
  },
}
SCSS
$custom: #181b8d;
$custom-light: #6d5ab0;
$custom-dark: #000000;
JSON
{
  "hex": "#181b8d",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 141
  },
  "hsl": {
    "h": 238.462,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3247,
    "c": 0.17889,
    "h": 269.8
  },
  "luminance": 0.02901
}

Semantic roles & 50–950 ramp

primary
#181B8D
secondary
#BFBC42
accent
#E93AEE
background
#F7F5FB
surface
#EDE9F6
border
#C8C5D0
text
#090411
muted
#7B7980

Preview Lab

Preview with #181B8D

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

Preview Lab → · Contrast checker → · Palette generator →

#181B8D Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva