#183B90#183B90

#183B90 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.147 H 263.8°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX#183B90
RGBrgb(24, 59, 144)
HSLhsl(223, 71%, 33%)
HSVhsv(223, 83%, 56%)
CMYKcmyk(83.3%, 59%, 0%, 43.5%)
CIE-LABlab(27.67, 21.09, -50.43)
CIE-LCHlch(27.67, 54.66, 292.69°)
OKLaboklab(38.41% -0.0157 -0.1457)
OKLCHoklch(38.41% 0.147 263.8)
XYZxyz(6.9729, 5.3349, 27.0424)
Luminance0.0534 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183B90 #906D18
analogous
#187790 #183B90 #311890
triadic
#183B90 #90183B #3B9018
tetradic
#183B90 #901877 #906D18 #189031
square
#183B90 #901877 #906D18 #189031
split-complementary
#183B90 #903118 #779018
monochromatic
#071027 #0F265C #183B90 #2150C4 #4371E0

Accessibility & contrast

On white

10.16
#183B90 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.07
#183B90 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B90
10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183B90#FFFFFF#000000##FFFFFF
##183B901.0010.162.0710.16
#FFFFFF10.161.0021.001.00
#0000002.0721.001.0021.00
##FFFFFF10.161.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004793
Deuteranopia (green-blind)
#003C8E
Tritanopia (blue-blind)
#00505F
Achromatopsia (no color)
#414141

Design tokens & code

CSS
--color: #183b90;
/* rgb */ color: rgb(24, 59, 144);
/* oklch */ color: oklch(38.4% 0.147 263.8);
Tailwind
colors: {
  custom: {
    50: '#6b70b1',
    500: '#183b90',
    950: '#000000',
  },
}
SCSS
$custom: #183b90;
$custom-light: #6b70b1;
$custom-dark: #000000;
JSON
{
  "hex": "#183b90",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 144
  },
  "hsl": {
    "h": 222.5,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38409,
    "c": 0.14657,
    "h": 263.8
  },
  "luminance": 0.05336
}

Semantic roles & 50–950 ramp

primary
#183B90
secondary
#C09C43
accent
#BA3AEE
background
#F7F6FB
surface
#EDECF6
border
#C8C7D0
text
#080711
muted
#7B7A80

Preview Lab

Preview with #183B90

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

Preview Lab → · Contrast checker → · Palette generator →

#183B90 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva