#183640#183640

#183640 is a dark, muted cyan. Relative luminance 0.032; OKLCH L 31.4% C 0.040 H 222.1°. Best body text is #FFFFFF at 12.80:1 contrast (WCAG AA passes).

Color values

HEX#183640
RGBrgb(24, 54, 64)
HSLhsl(195, 45%, 17%)
HSVhsv(195, 63%, 25%)
CMYKcmyk(62.5%, 15.6%, 0%, 74.9%)
CIE-LABlab(20.84, -7.72, -9.65)
CIE-LCHlch(20.84, 12.36, 231.32°)
OKLaboklab(31.45% -0.0296 -0.0268)
OKLCHoklch(31.45% 0.04 222.1)
XYZxyz(2.6209, 3.2025, 5.3295)
Luminance0.0320 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183640 #402218
analogous
#184036 #183640 #182240
triadic
#183640 #401836 #364018
tetradic
#183640 #361840 #402218 #224018
square
#183640 #361840 #402218 #224018
split-complementary
#183640 #401822 #403618
monochromatic
#081316 #081316 #183640 #295C6D #398199

Accessibility & contrast

On white

12.80
#183640 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.64
#183640 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183640
12.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183640#FFFFFF#000000##FFFFFF
##1836401.0012.801.6412.80
#FFFFFF12.801.0021.001.00
#0000001.6421.001.0021.00
##FFFFFF12.801.0021.001.00

Color blindness preview

Protanopia (red-blind)
#303541
Deuteranopia (green-blind)
#2A3040
Tritanopia (blue-blind)
#003939
Achromatopsia (no color)
#323232

Design tokens & code

CSS
--color: #183640;
/* rgb */ color: rgb(24, 54, 64);
/* oklch */ color: oklch(31.4% 0.040 222.1);
Tailwind
colors: {
  custom: {
    50: '#596d74',
    500: '#183640',
    950: '#000000',
  },
}
SCSS
$custom: #183640;
$custom-light: #596d74;
$custom-dark: #000000;
JSON
{
  "hex": "#183640",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 64
  },
  "hsl": {
    "h": 195,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.31446,
    "c": 0.03989,
    "h": 222.1
  },
  "luminance": 0.03203
}

Semantic roles & 50–950 ramp

primary
#183640
secondary
#774C3D
accent
#7353D5
background
#F5F6F7
surface
#E9EBED
border
#C5C6C8
text
#040708
muted
#797A7B

Preview Lab

Preview with #183640

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

Preview Lab → · Contrast checker → · Palette generator →

#183640 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva