#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
RGB	rgb(24, 54, 64)
HSL	hsl(195, 45%, 17%)
HSV	hsv(195, 63%, 25%)
CMYK	cmyk(62.5%, 15.6%, 0%, 74.9%)
CIE-LAB	lab(20.84, -7.72, -9.65)
CIE-LCH	lch(20.84, 12.36, 231.32°)
OKLab	oklab(31.45% -0.0296 -0.0268)
OKLCH	oklch(31.45% 0.04 222.1)
XYZ	xyz(2.6209, 3.2025, 5.3295)
Luminance	0.0320 (WCAG relative)
Temperature	cool
Family	cyan

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
##183640	1.00	12.80	1.64	12.80
#FFFFFF	12.80	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.80	1.00	21.00	1.00

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 →