#183A39#183A39

#183A39 is a dark, muted teal. Relative luminance 0.035; OKLCH L 32.3% C 0.040 H 192.8°. Best body text is #FFFFFF at 12.33:1 contrast (WCAG AA passes).

Color values

HEX	#183A39
RGB	rgb(24, 58, 57)
HSL	hsl(178, 41%, 16%)
HSV	hsv(178, 59%, 23%)
CMYK	cmyk(58.6%, 0%, 1.7%, 77.3%)
CIE-LAB	lab(22.00, -12.60, -3.17)
CIE-LCH	lch(22.00, 12.99, 194.11°)
OKLab	oklab(32.29% -0.0386 -0.0088)
OKLCH	oklch(32.29% 0.04 192.8)
XYZ	xyz(2.6280, 3.5155, 4.4102)
Luminance	0.0352 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A39 #3A1819

analogous

#183A28 #183A39 #182A3A

triadic

#183A39 #39183A #3A3918

tetradic

#183A39 #28183A #3A1819 #2A3A18

square

#183A39 #28183A #3A1819 #2A3A18

split-complementary

#183A39 #3A182A #3A2818

monochromatic

#091615 #091615 #183A39 #2A6564 #3C918E

Accessibility & contrast

On white

12.33

#183A39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#183A39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A39

12.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A39	#FFFFFF	#000000	##FFFFFF
##183A39	1.00	12.33	1.70	12.33
#FFFFFF	12.33	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373739

Deuteranopia (green-blind)

#313339

Tritanopia (blue-blind)

#033C3A

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #183a39;
/* rgb */ color: rgb(24, 58, 57);
/* oklch */ color: oklch(32.3% 0.040 192.8);

Tailwind

colors: {
  custom: {
    50: '#59706f',
    500: '#183a39',
    950: '#000000',
  },
}

SCSS

$custom: #183a39;
$custom-light: #59706f;
$custom-dark: #000000;

JSON

{
  "hex": "#183a39",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 57
  },
  "hsl": {
    "h": 178.235,
    "s": 41.463,
    "l": 16.078
  },
  "oklch": {
    "l": 0.32288,
    "c": 0.0396,
    "h": 192.8
  },
  "luminance": 0.03516
}

Semantic roles & 50–950 ramp

primary

#183A39

secondary

#703E3F

accent

#575AD1

background

#F5F6F6

surface

#E9ECEC

border

#C5C7C7

text

#040707

muted

#797A7A

Preview Lab

Preview with #183A39

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

Preview Lab → · Contrast checker → · Palette generator →