#183F43#183F43

#183F43 is a dark, muted teal. Relative luminance 0.042; OKLCH L 34.2% C 0.044 H 204.4°. Best body text is #FFFFFF at 11.47:1 contrast (WCAG AA passes).

Color values

HEX	#183F43
RGB	rgb(24, 63, 67)
HSL	hsl(186, 47%, 18%)
HSV	hsv(186, 64%, 26%)
CMYK	cmyk(64.2%, 6%, 0%, 73.7%)
CIE-LAB	lab(24.17, -12.27, -6.60)
CIE-LCH	lch(24.17, 13.94, 208.28°)
OKLab	oklab(34.16% -0.0402 -0.0183)
OKLCH	oklch(34.16% 0.044 204.4)
XYZ	xyz(3.1669, 4.1541, 5.9440)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F43 #431C18

analogous

#184331 #183F43 #182943

triadic

#183F43 #43183F #3F4318

tetradic

#183F43 #311843 #431C18 #294318

square

#183F43 #311843 #431C18 #294318

split-complementary

#183F43 #431829 #433118

monochromatic

#081517 #081517 #183F43 #286970 #38949D

Accessibility & contrast

On white

11.47

#183F43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183F43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F43

11.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F43	#FFFFFF	#000000	##FFFFFF
##183F43	1.00	11.47	1.83	11.47
#FFFFFF	11.47	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A3C43

Deuteranopia (green-blind)

#333743

Tritanopia (blue-blind)

#004240

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183f43;
/* rgb */ color: rgb(24, 63, 67);
/* oklch */ color: oklch(34.2% 0.044 204.4);

Tailwind

colors: {
  custom: {
    50: '#5a7477',
    500: '#183f43',
    950: '#000000',
  },
}

SCSS

$custom: #183f43;
$custom-light: #5a7477;
$custom-dark: #000000;

JSON

{
  "hex": "#183f43",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 67
  },
  "hsl": {
    "h": 185.581,
    "s": 47.253,
    "l": 17.843
  },
  "oklch": {
    "l": 0.34164,
    "c": 0.04415,
    "h": 204.4
  },
  "luminance": 0.04154
}

Semantic roles & 50–950 ramp

primary

#183F43

secondary

#7A433D

accent

#5D51D7

background

#F5F7F7

surface

#E9EDED

border

#C5C8C8

text

#040808

muted

#797B7B

Preview Lab

Preview with #183F43

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

Preview Lab → · Contrast checker → · Palette generator →