#183B3F#183B3F

#183B3F is a dark, muted teal. Relative luminance 0.037; OKLCH L 32.8% C 0.041 H 205.3°. Best body text is #FFFFFF at 12.10:1 contrast (WCAG AA passes).

Color values

HEX	#183B3F
RGB	rgb(24, 59, 63)
HSL	hsl(186, 45%, 17%)
HSV	hsv(186, 62%, 25%)
CMYK	cmyk(61.9%, 6.3%, 0%, 75.3%)
CIE-LAB	lab(22.59, -11.21, -6.32)
CIE-LCH	lch(22.59, 12.87, 209.42°)
OKLab	oklab(32.84% -0.0369 -0.0175)
OKLCH	oklch(32.84% 0.041 205.3)
XYZ	xyz(2.8375, 3.6807, 5.2626)
Luminance	0.0368 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B3F #3F1C18

analogous

#183F30 #183B3F #18283F

triadic

#183B3F #3F183B #3B3F18

tetradic

#183B3F #30183F #3F1C18 #283F18

square

#183B3F #30183F #3F1C18 #283F18

split-complementary

#183B3F #3F1828 #3F3018

monochromatic

#081516 #081516 #183B3F #29656B #3A8E98

Accessibility & contrast

On white

12.10

#183B3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#183B3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B3F

12.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B3F	#FFFFFF	#000000	##FFFFFF
##183B3F	1.00	12.10	1.74	12.10
#FFFFFF	12.10	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#36393F

Deuteranopia (green-blind)

#30343F

Tritanopia (blue-blind)

#003D3C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183b3f;
/* rgb */ color: rgb(24, 59, 63);
/* oklch */ color: oklch(32.8% 0.041 205.3);

Tailwind

colors: {
  custom: {
    50: '#597174',
    500: '#183b3f',
    950: '#000000',
  },
}

SCSS

$custom: #183b3f;
$custom-light: #597174;
$custom-dark: #000000;

JSON

{
  "hex": "#183b3f",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 63
  },
  "hsl": {
    "h": 186.154,
    "s": 44.828,
    "l": 17.059
  },
  "oklch": {
    "l": 0.32835,
    "c": 0.04081,
    "h": 205.3
  },
  "luminance": 0.03681
}

Semantic roles & 50–950 ramp

primary

#183B3F

secondary

#75433D

accent

#6153D5

background

#F5F6F7

surface

#E9ECED

border

#C5C7C8

text

#040708

muted

#797A7B

Preview Lab

Preview with #183B3F

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

Preview Lab → · Contrast checker → · Palette generator →