#183F40#183F40

#183F40 is a dark, muted teal. Relative luminance 0.041; OKLCH L 34.0% C 0.044 H 197.6°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#183F40
RGB	rgb(24, 63, 64)
HSL	hsl(182, 45%, 17%)
HSV	hsv(182, 63%, 25%)
CMYK	cmyk(62.5%, 1.6%, 0%, 74.9%)
CIE-LAB	lab(24.06, -13.29, -4.78)
CIE-LCH	lch(24.06, 14.12, 199.79°)
OKLab	oklab(34.03% -0.0417 -0.0132)
OKLCH	oklch(34.03% 0.044 197.6)
XYZ	xyz(3.0792, 4.1191, 5.4823)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F40 #401918

analogous

#18402D #183F40 #182B40

triadic

#183F40 #40183F #3F4018

tetradic

#183F40 #2D1840 #401918 #2B4018

square

#183F40 #2D1840 #401918 #2B4018

split-complementary

#183F40 #40182B #402D18

monochromatic

#081616 #081616 #183F40 #296B6D #399799

Accessibility & contrast

On white

11.51

#183F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F40

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F40	#FFFFFF	#000000	##FFFFFF
##183F40	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B3C40

Deuteranopia (green-blind)

#343740

Tritanopia (blue-blind)

#00413F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183f40;
/* rgb */ color: rgb(24, 63, 64);
/* oklch */ color: oklch(34.0% 0.044 197.6);

Tailwind

colors: {
  custom: {
    50: '#5a7474',
    500: '#183f40',
    950: '#000000',
  },
}

SCSS

$custom: #183f40;
$custom-light: #5a7474;
$custom-dark: #000000;

JSON

{
  "hex": "#183f40",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 64
  },
  "hsl": {
    "h": 181.5,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.34035,
    "c": 0.04377,
    "h": 197.6
  },
  "luminance": 0.04119
}

Semantic roles & 50–950 ramp

primary

#183F40

secondary

#773F3D

accent

#5653D5

background

#F5F7F7

surface

#E9EDED

border

#C5C8C8

text

#040808

muted

#797B7B

Preview Lab

Preview with #183F40

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

Preview Lab → · Contrast checker → · Palette generator →