#183E40#183E40

#183E40 is a dark, muted teal. Relative luminance 0.040; OKLCH L 33.7% C 0.043 H 200.0°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#183E40
RGB	rgb(24, 62, 64)
HSL	hsl(183, 45%, 17%)
HSV	hsv(183, 63%, 25%)
CMYK	cmyk(62.5%, 3.1%, 0%, 74.9%)
CIE-LAB	lab(23.70, -12.69, -5.32)
CIE-LCH	lch(23.70, 13.76, 202.74°)
OKLab	oklab(33.75% -0.0404 -0.0147)
OKLCH	oklch(33.75% 0.043 200)
XYZ	xyz(3.0243, 4.0093, 5.4640)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E40 #401A18

analogous

#18402E #183E40 #182A40

triadic

#183E40 #40183E #3E4018

tetradic

#183E40 #2E1840 #401A18 #2A4018

square

#183E40 #2E1840 #401A18 #2A4018

split-complementary

#183E40 #40182A #402E18

monochromatic

#081616 #081616 #183E40 #29696D #399499

Accessibility & contrast

On white

11.65

#183E40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183E40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E40

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E40	#FFFFFF	#000000	##FFFFFF
##183E40	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393B40

Deuteranopia (green-blind)

#333640

Tritanopia (blue-blind)

#00403E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183e40;
/* rgb */ color: rgb(24, 62, 64);
/* oklch */ color: oklch(33.7% 0.043 200.0);

Tailwind

colors: {
  custom: {
    50: '#5a7374',
    500: '#183e40',
    950: '#000000',
  },
}

SCSS

$custom: #183e40;
$custom-light: #5a7374;
$custom-dark: #000000;

JSON

{
  "hex": "#183e40",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 64
  },
  "hsl": {
    "h": 183,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.33745,
    "c": 0.04299,
    "h": 200
  },
  "luminance": 0.0401
}

Semantic roles & 50–950 ramp

primary

#183E40

secondary

#77403D

accent

#5953D5

background

#F5F7F7

surface

#E9EDED

border

#C5C8C8

text

#040808

muted

#797B7B

Preview Lab

Preview with #183E40

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

Preview Lab → · Contrast checker → · Palette generator →