#183B45#183B45

#183B45 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.1% C 0.044 H 219.2°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).

Color values

HEX	#183B45
RGB	rgb(24, 59, 69)
HSL	hsl(193, 48%, 18%)
HSV	hsv(193, 65%, 27%)
CMYK	cmyk(65.2%, 14.5%, 0%, 72.9%)
CIE-LAB	lab(22.83, -9.11, -9.97)
CIE-LCH	lch(22.83, 13.51, 227.56°)
OKLab	oklab(33.11% -0.034 -0.0277)
OKLCH	oklch(33.11% 0.044 219.2)
XYZ	xyz(3.0144, 3.7515, 6.1943)
Luminance	0.0375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B45 #452218

analogous

#184538 #183B45 #182445

triadic

#183B45 #45183B #3B4518

tetradic

#183B45 #381845 #452218 #244518

square

#183B45 #381845 #452218 #244518

split-complementary

#183B45 #451824 #453818

monochromatic

#081317 #081418 #183B45 #286272 #3889A0

Accessibility & contrast

On white

12.00

#183B45 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#183B45 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B45

12.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B45	#FFFFFF	#000000	##FFFFFF
##183B45	1.00	12.00	1.75	12.00
#FFFFFF	12.00	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353946

Deuteranopia (green-blind)

#2E3445

Tritanopia (blue-blind)

#003E3E

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183b45;
/* rgb */ color: rgb(24, 59, 69);
/* oklch */ color: oklch(33.1% 0.044 219.2);

Tailwind

colors: {
  custom: {
    50: '#5a7178',
    500: '#183b45',
    950: '#000000',
  },
}

SCSS

$custom: #183b45;
$custom-light: #5a7178;
$custom-dark: #000000;

JSON

{
  "hex": "#183b45",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 69
  },
  "hsl": {
    "h": 193.333,
    "s": 48.387,
    "l": 18.235
  },
  "oklch": {
    "l": 0.33113,
    "c": 0.04381,
    "h": 219.2
  },
  "luminance": 0.03752
}

Semantic roles & 50–950 ramp

primary

#183B45

secondary

#7C4B3D

accent

#6E50D8

background

#F5F6F7

surface

#E9ECED

border

#C5C7C8

text

#040709

muted

#797A7B

Preview Lab

Preview with #183B45

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

Preview Lab → · Contrast checker → · Palette generator →