#183F42#183F42

#183F42 is a dark, muted teal. Relative luminance 0.041; OKLCH L 34.1% C 0.044 H 202.2°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#183F42
RGB	rgb(24, 63, 66)
HSL	hsl(184, 47%, 18%)
HSV	hsv(184, 64%, 26%)
CMYK	cmyk(63.6%, 4.5%, 0%, 74.1%)
CIE-LAB	lab(24.14, -12.61, -6.00)
CIE-LCH	lch(24.14, 13.97, 205.43°)
OKLab	oklab(34.12% -0.0407 -0.0166)
OKLCH	oklch(34.12% 0.044 202.2)
XYZ	xyz(3.1372, 4.1422, 5.7874)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F42 #421B18

analogous

#184230 #183F42 #182A42

triadic

#183F42 #42183F #3F4218

tetradic

#183F42 #301842 #421B18 #2A4218

square

#183F42 #301842 #421B18 #2A4218

split-complementary

#183F42 #42182A #423018

monochromatic

#081516 #081516 #183F42 #286A6F #39959C

Accessibility & contrast

On white

11.48

#183F42 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183F42 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F42

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F42	#FFFFFF	#000000	##FFFFFF
##183F42	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A3C42

Deuteranopia (green-blind)

#333742

Tritanopia (blue-blind)

#004140

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183f42;
/* rgb */ color: rgb(24, 63, 66);
/* oklch */ color: oklch(34.1% 0.044 202.2);

Tailwind

colors: {
  custom: {
    50: '#5a7476',
    500: '#183f42',
    950: '#000000',
  },
}

SCSS

$custom: #183f42;
$custom-light: #5a7476;
$custom-dark: #000000;

JSON

{
  "hex": "#183f42",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 66
  },
  "hsl": {
    "h": 184.286,
    "s": 46.667,
    "l": 17.647
  },
  "oklch": {
    "l": 0.3412,
    "c": 0.04396,
    "h": 202.2
  },
  "luminance": 0.04143
}

Semantic roles & 50–950 ramp

primary

#183F42

secondary

#79413D

accent

#5B51D6

background

#F5F7F7

surface

#E9EDED

border

#C5C8C8

text

#040808

muted

#797B7B

Preview Lab

Preview with #183F42

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

Preview Lab → · Contrast checker → · Palette generator →