#183B86#183B86

#183B86 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.132 H 262.9°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX#183B86
RGBrgb(24, 59, 134)
HSLhsl(221, 70%, 31%)
HSVhsv(221, 82%, 53%)
CMYKcmyk(82.1%, 56%, 0%, 47.5%)
CIE-LABlab(26.86, 17.01, -45.56)
CIE-LCHlch(26.86, 48.63, 290.47°)
OKLaboklab(37.54% -0.0165 -0.1314)
OKLCHoklch(37.54% 0.132 262.9)
XYZxyz(6.2422, 5.0426, 23.1940)
Luminance0.0504 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183B86 #866318
analogous
#187286 #183B86 #2C1886
triadic
#183B86 #86183B #3B8618
tetradic
#183B86 #861872 #866318 #18862C
square
#183B86 #861872 #866318 #18862C
split-complementary
#183B86 #862C18 #728618
monochromatic
#050D1E #0F2452 #183B86 #2152BA #3C6FDC

Accessibility & contrast

On white

10.46
#183B86 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.01
#183B86 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B86
10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183B86#FFFFFF#000000##FFFFFF
##183B861.0010.462.0110.46
#FFFFFF10.461.0021.001.00
#0000002.0121.001.0021.00
##FFFFFF10.461.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004589
Deuteranopia (green-blind)
#003B85
Tritanopia (blue-blind)
#004D5A
Achromatopsia (no color)
#3F3F3F

Design tokens & code

CSS
--color: #183b86;
/* rgb */ color: rgb(24, 59, 134);
/* oklch */ color: oklch(37.5% 0.132 262.9);
Tailwind
colors: {
  custom: {
    50: '#6870aa',
    500: '#183b86',
    950: '#000000',
  },
}
SCSS
$custom: #183b86;
$custom-light: #6870aa;
$custom-dark: #000000;
JSON
{
  "hex": "#183b86",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 134
  },
  "hsl": {
    "h": 220.909,
    "s": 69.62,
    "l": 30.98
  },
  "oklch": {
    "l": 0.37541,
    "c": 0.13244,
    "h": 262.9
  },
  "luminance": 0.05043
}

Semantic roles & 50–950 ramp

primary
#183B86
secondary
#BA9340
accent
#B43BEC
background
#F6F6FA
surface
#ECECF4
border
#C7C7CE
text
#070710
muted
#7A7A7F

Preview Lab

Preview with #183B86

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

Preview Lab → · Contrast checker → · Palette generator →

#183B86 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva