#183681#183681

#183681 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.0% C 0.132 H 264.3°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX#183681
RGBrgb(24, 54, 129)
HSLhsl(223, 69%, 30%)
HSVhsv(223, 81%, 51%)
CMYKcmyk(81.4%, 58.1%, 0%, 49.4%)
CIE-LABlab(25.00, 18.47, -45.44)
CIE-LCHlch(25.00, 49.05, 292.13°)
OKLaboklab(36.02% -0.0132 -0.1312)
OKLCHoklch(36.02% 0.132 264.3)
XYZxyz(5.6569, 4.4168, 21.3190)
Luminance0.0442 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183681 #816318
analogous
#186B81 #183681 #2E1881
triadic
#183681 #811836 #368118
tetradic
#183681 #81186B #816318 #18812E
square
#183681 #81186B #816318 #18812E
split-complementary
#183681 #812E18 #6B8118
monochromatic
#050B1A #0E204D #183681 #224CB5 #3967DA

Accessibility & contrast

On white

11.15
#183681 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.88
#183681 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183681
11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183681#FFFFFF#000000##FFFFFF
##1836811.0011.151.8811.15
#FFFFFF11.151.0021.001.00
#0000001.8821.001.0021.00
##FFFFFF11.151.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004084
Deuteranopia (green-blind)
#003780
Tritanopia (blue-blind)
#004956
Achromatopsia (no color)
#3B3B3B

Design tokens & code

CSS
--color: #183681;
/* rgb */ color: rgb(24, 54, 129);
/* oklch */ color: oklch(36.0% 0.132 264.3);
Tailwind
colors: {
  custom: {
    50: '#676ca6',
    500: '#183681',
    950: '#000000',
  },
}
SCSS
$custom: #183681;
$custom-light: #676ca6;
$custom-dark: #000000;
JSON
{
  "hex": "#183681",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 129
  },
  "hsl": {
    "h": 222.857,
    "s": 68.627,
    "l": 30
  },
  "oklch": {
    "l": 0.36016,
    "c": 0.13182,
    "h": 264.3
  },
  "luminance": 0.04418
}

Semantic roles & 50–950 ramp

primary
#183681
secondary
#B59440
accent
#B93CEB
background
#F6F6FA
surface
#EBEBF4
border
#C6C6CE
text
#07060F
muted
#7A7A7F

Preview Lab

Preview with #183681

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

Preview Lab → · Contrast checker → · Palette generator →

#183681 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva