#183559#183559

#183559 is a dark, moderate cyan. Relative luminance 0.035; OKLCH L 32.6% C 0.073 H 255.0°. Best body text is #FFFFFF at 12.41:1 contrast (WCAG AA passes).

Color values

HEX#183559
RGBrgb(24, 53, 89)
HSLhsl(213, 58%, 22%)
HSVhsv(213, 73%, 35%)
CMYKcmyk(73%, 40.4%, 0%, 65.1%)
CIE-LABlab(21.80, 2.64, -24.86)
CIE-LCHlch(21.80, 25.00, 276.06°)
OKLaboklab(32.64% -0.0189 -0.0707)
OKLCHoklch(32.64% 0.073 255)
XYZxyz(3.4523, 3.4613, 9.9354)
Luminance0.0346 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183559 #593C18
analogous
#185659 #183559 #1C1859
triadic
#183559 #591835 #355918
tetradic
#183559 #591856 #593C18 #18591C
square
#183559 #591856 #593C18 #18591C
split-complementary
#183559 #591C18 #565918
monochromatic
#060E18 #0B1829 #183559 #255289 #326EB9

Accessibility & contrast

On white

12.41
#183559 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.69
#183559 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183559
12.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183559#FFFFFF#000000##FFFFFF
##1835591.0012.411.6912.41
#FFFFFF12.411.0021.001.00
#0000001.6921.001.0021.00
##FFFFFF12.411.0021.001.00

Color blindness preview

Protanopia (red-blind)
#25385A
Deuteranopia (green-blind)
#1B3158
Tritanopia (blue-blind)
#003D42
Achromatopsia (no color)
#343434

Design tokens & code

CSS
--color: #183559;
/* rgb */ color: rgb(24, 53, 89);
/* oklch */ color: oklch(32.6% 0.073 255.0);
Tailwind
colors: {
  custom: {
    50: '#5d6b88',
    500: '#183559',
    950: '#000000',
  },
}
SCSS
$custom: #183559;
$custom-light: #5d6b88;
$custom-dark: #000000;
JSON
{
  "hex": "#183559",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 89
  },
  "hsl": {
    "h": 213.231,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.32641,
    "c": 0.07318,
    "h": 255
  },
  "luminance": 0.03462
}

Semantic roles & 50–950 ramp

primary
#183559
secondary
#906B3D
accent
#9C47E1
background
#F5F6F8
surface
#E9EBEF
border
#C5C6CA
text
#05060B
muted
#797A7C

Preview Lab

Preview with #183559

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

Preview Lab → · Contrast checker → · Palette generator →

#183559 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva