#183B79#183B79

#183B79 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.5% C 0.114 H 260.8°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX#183B79
RGBrgb(24, 59, 121)
HSLhsl(218, 67%, 28%)
HSVhsv(218, 80%, 47%)
CMYKcmyk(80.2%, 51.2%, 0%, 52.5%)
CIE-LABlab(25.87, 11.64, -39.00)
CIE-LCHlch(25.87, 40.70, 286.61°)
OKLaboklab(36.48% -0.0181 -0.1121)
OKLCHoklch(36.48% 0.114 260.8)
XYZxyz(5.3906, 4.7020, 18.7089)
Luminance0.0470 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183B79 #795618
analogous
#186B79 #183B79 #261879
triadic
#183B79 #79183B #3B7918
tetradic
#183B79 #79186B #795618 #187926
square
#183B79 #79186B #795618 #187926
split-complementary
#183B79 #792618 #6B7918
monochromatic
#050C1A #0E2246 #183B79 #2254AC #356FD7

Accessibility & contrast

On white

10.82
#183B79 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.94
#183B79 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B79
10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183B79#FFFFFF#000000##FFFFFF
##183B791.0010.821.9410.82
#FFFFFF10.821.0021.001.00
#0000001.9421.001.0021.00
##FFFFFF10.821.0021.001.00

Color blindness preview

Protanopia (red-blind)
#16427B
Deuteranopia (green-blind)
#003978
Tritanopia (blue-blind)
#004A54
Achromatopsia (no color)
#3D3D3D

Design tokens & code

CSS
--color: #183b79;
/* rgb */ color: rgb(24, 59, 121);
/* oklch */ color: oklch(36.5% 0.114 260.8);
Tailwind
colors: {
  custom: {
    50: '#6570a0',
    500: '#183b79',
    950: '#000000',
  },
}
SCSS
$custom: #183b79;
$custom-light: #6570a0;
$custom-dark: #000000;
JSON
{
  "hex": "#183b79",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 218.351,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36476,
    "c": 0.11358,
    "h": 260.8
  },
  "luminance": 0.04703
}

Semantic roles & 50–950 ramp

primary
#183B79
secondary
#AE863F
accent
#AC3EEA
background
#F6F6F9
surface
#EBECF2
border
#C6C7CC
text
#06070F
muted
#7A7A7E

Preview Lab

Preview with #183B79

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

Preview Lab → · Contrast checker → · Palette generator →

#183B79 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva