#180D5B#180D5B

#180D5B is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.5% C 0.128 H 277.6°. Best body text is #FFFFFF at 16.84:1 contrast (WCAG AA passes).

Color values

HEX#180D5B
RGBrgb(24, 13, 91)
HSLhsl(248, 75%, 20%)
HSVhsv(248, 86%, 36%)
CMYKcmyk(73.6%, 85.7%, 0%, 64.3%)
CIE-LABlab(10.83, 31.21, -44.00)
CIE-LCHlch(10.83, 53.95, 305.35°)
OKLaboklab(24.52% 0.0169 -0.1271)
OKLCHoklch(24.52% 0.128 277.6)
XYZxyz(2.4083, 1.2372, 10.0074)
Luminance0.0124 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#180D5B #505B0D
analogous
#0D295B #180D5B #3F0D5B
triadic
#180D5B #5B180D #0D5B18
tetradic
#180D5B #5B0D29 #505B0D #0D5B3F
square
#180D5B #5B0D29 #505B0D #0D5B3F
split-complementary
#180D5B #5B3F0D #295B0D
monochromatic
#07041B #0A0525 #180D5B #261591 #341CC6

Accessibility & contrast

On white

16.84
#180D5B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.25
#180D5B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180D5B
16.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##180D5B#FFFFFF#000000##FFFFFF
##180D5B1.0016.841.2516.84
#FFFFFF16.841.0021.001.00
#0000001.2521.001.0021.00
##FFFFFF16.841.0021.001.00

Color blindness preview

Protanopia (red-blind)
#00205D
Deuteranopia (green-blind)
#001A5A
Tritanopia (blue-blind)
#002534
Achromatopsia (no color)
#1D1D1D

Design tokens & code

CSS
--color: #180d5b;
/* rgb */ color: rgb(24, 13, 91);
/* oklch */ color: oklch(24.5% 0.128 277.6);
Tailwind
colors: {
  custom: {
    50: '#614e8a',
    500: '#180d5b',
    950: '#000000',
  },
}
SCSS
$custom: #180d5b;
$custom-light: #614e8a;
$custom-dark: #000000;
JSON
{
  "hex": "#180d5b",
  "rgb": {
    "r": 24,
    "g": 13,
    "b": 91
  },
  "hsl": {
    "h": 248.462,
    "s": 75,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24518,
    "c": 0.12825,
    "h": 277.6
  },
  "luminance": 0.01237
}

Semantic roles & 50–950 ramp

primary
#180D5B
secondary
#87952F
accent
#F236D7
background
#F6F4F8
surface
#EBE7F0
border
#C6C3CB
text
#06020C
muted
#7A787D

Preview Lab

Preview with #180D5B

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

Preview Lab → · Contrast checker → · Palette generator →

#180D5B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva