#183B3A#183B3A

#183B3A is a dark, muted teal. Relative luminance 0.036; OKLCH L 32.6% C 0.040 H 192.8°. Best body text is #FFFFFF at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#183B3A
RGB	rgb(24, 59, 58)
HSL	hsl(178, 42%, 16%)
HSV	hsv(178, 59%, 23%)
CMYK	cmyk(59.3%, 0%, 1.7%, 76.9%)
CIE-LAB	lab(22.40, -12.88, -3.25)
CIE-LCH	lch(22.40, 13.28, 194.16°)
OKLab	oklab(32.62% -0.0395 -0.009)
OKLCH	oklch(32.62% 0.04 192.8)
XYZ	xyz(2.7041, 3.6274, 4.5598)
Luminance	0.0363 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B3A #3B1819

analogous

#183B29 #183B3A #182B3B

triadic

#183B3A #3A183B #3B3A18

tetradic

#183B3A #29183B #3B1819 #2B3B18

square

#183B3A #29183B #3B1819 #2B3B18

split-complementary

#183B3A #3B182B #3B2918

monochromatic

#091615 #091615 #183B3A #2A6765 #3B9290

Accessibility & contrast

On white

12.17

#183B3A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#183B3A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B3A

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B3A	#FFFFFF	#000000	##FFFFFF
##183B3A	1.00	12.17	1.73	12.17
#FFFFFF	12.17	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#37383A

Deuteranopia (green-blind)

#32343A

Tritanopia (blue-blind)

#023D3B

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183b3a;
/* rgb */ color: rgb(24, 59, 58);
/* oklch */ color: oklch(32.6% 0.040 192.8);

Tailwind

colors: {
  custom: {
    50: '#597170',
    500: '#183b3a',
    950: '#000000',
  },
}

SCSS

$custom: #183b3a;
$custom-light: #597170;
$custom-dark: #000000;

JSON

{
  "hex": "#183b3a",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 58
  },
  "hsl": {
    "h": 178.286,
    "s": 42.169,
    "l": 16.275
  },
  "oklch": {
    "l": 0.32622,
    "c": 0.04047,
    "h": 192.8
  },
  "luminance": 0.03628
}

Semantic roles & 50–950 ramp

primary

#183B3A

secondary

#713E3F

accent

#5659D2

background

#F5F6F6

surface

#E9ECEC

border

#C5C7C7

text

#040707

muted

#797A7A

Preview Lab

Preview with #183B3A

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

Preview Lab → · Contrast checker → · Palette generator →