#183B40#183B40

#183B40 is a dark, muted teal. Relative luminance 0.037; OKLCH L 32.9% C 0.041 H 207.8°. Best body text is #FFFFFF at 12.08:1 contrast (WCAG AA passes).

Color values

HEX	#183B40
RGB	rgb(24, 59, 64)
HSL	hsl(188, 45%, 17%)
HSV	hsv(188, 63%, 25%)
CMYK	cmyk(62.5%, 7.8%, 0%, 74.9%)
CIE-LAB	lab(22.63, -10.87, -6.93)
CIE-LCH	lch(22.63, 12.89, 212.54°)
OKLab	oklab(32.88% -0.0364 -0.0192)
OKLCH	oklch(32.88% 0.041 207.8)
XYZ	xyz(2.8657, 3.6920, 5.4111)
Luminance	0.0369 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B40 #401D18

analogous

#184031 #183B40 #182740

triadic

#183B40 #40183B #3B4018

tetradic

#183B40 #311840 #401D18 #274018

square

#183B40 #311840 #401D18 #274018

split-complementary

#183B40 #401827 #403118

monochromatic

#081516 #081516 #183B40 #29646D #398D99

Accessibility & contrast

On white

12.08

#183B40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#183B40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B40

12.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B40	#FFFFFF	#000000	##FFFFFF
##183B40	1.00	12.08	1.74	12.08
#FFFFFF	12.08	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363940

Deuteranopia (green-blind)

#303440

Tritanopia (blue-blind)

#003E3C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183b40;
/* rgb */ color: rgb(24, 59, 64);
/* oklch */ color: oklch(32.9% 0.041 207.8);

Tailwind

colors: {
  custom: {
    50: '#597174',
    500: '#183b40',
    950: '#000000',
  },
}

SCSS

$custom: #183b40;
$custom-light: #597174;
$custom-dark: #000000;

JSON

{
  "hex": "#183b40",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 64
  },
  "hsl": {
    "h": 187.5,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.32879,
    "c": 0.04112,
    "h": 207.8
  },
  "luminance": 0.03692
}

Semantic roles & 50–950 ramp

primary

#183B40

secondary

#77443D

accent

#6353D5

background

#F5F6F7

surface

#E9ECED

border

#C5C7C8

text

#040708

muted

#797A7B

Preview Lab

Preview with #183B40

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

Preview Lab → · Contrast checker → · Palette generator →