#183D4A#183D4A

#183D4A is a dark, muted cyan. Relative luminance 0.040; OKLCH L 33.9% C 0.048 H 224.0°. Best body text is #FFFFFF at 11.63:1 contrast (WCAG AA passes).

Color values

HEX#183D4A
RGBrgb(24, 61, 74)
HSLhsl(196, 51%, 19%)
HSVhsv(196, 68%, 29%)
CMYKcmyk(67.6%, 17.6%, 0%, 71%)
CIE-LABlab(23.76, -8.56, -11.88)
CIE-LCHlch(23.76, 14.65, 234.23°)
OKLaboklab(33.92% -0.0343 -0.0331)
OKLCHoklch(33.92% 0.048 224)
XYZxyz(3.2810, 4.0258, 7.0814)
Luminance0.0403 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183D4A #4A2518
analogous
#184A3E #183D4A #18244A
triadic
#183D4A #4A183D #3D4A18
tetradic
#183D4A #3E184A #4A2518 #244A18
square
#183D4A #3E184A #4A2518 #244A18
split-complementary
#183D4A #4A1824 #4A3E18
monochromatic
#071317 #09171C #183D4A #276378 #3689A6

Accessibility & contrast

On white

11.63
#183D4A on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.81
#183D4A on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D4A
11.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183D4A#FFFFFF#000000##FFFFFF
##183D4A1.0011.631.8111.63
#FFFFFF11.631.0021.001.00
#0000001.8121.001.0021.00
##FFFFFF11.631.0021.001.00

Color blindness preview

Protanopia (red-blind)
#363C4B
Deuteranopia (green-blind)
#2F364A
Tritanopia (blue-blind)
#004141
Achromatopsia (no color)
#393939

Design tokens & code

CSS
--color: #183d4a;
/* rgb */ color: rgb(24, 61, 74);
/* oklch */ color: oklch(33.9% 0.048 224.0);
Tailwind
colors: {
  custom: {
    50: '#5b727c',
    500: '#183d4a',
    950: '#000000',
  },
}
SCSS
$custom: #183d4a;
$custom-light: #5b727c;
$custom-dark: #000000;
JSON
{
  "hex": "#183d4a",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 74
  },
  "hsl": {
    "h": 195.6,
    "s": 51.02,
    "l": 19.216
  },
  "oklch": {
    "l": 0.33924,
    "c": 0.04764,
    "h": 224
  },
  "luminance": 0.04026
}

Semantic roles & 50–950 ramp

primary
#183D4A
secondary
#814F3D
accent
#724DDA
background
#F5F6F7
surface
#E9ECEE
border
#C5C7C9
text
#040809
muted
#797B7B

Preview Lab

Preview with #183D4A

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

Preview Lab → · Contrast checker → · Palette generator →

#183D4A Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva