#173F40#173F40

#173F40 is a dark, muted teal. Relative luminance 0.041; OKLCH L 34.0% C 0.045 H 197.5°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#173F40
RGB	rgb(23, 63, 64)
HSL	hsl(181, 47%, 17%)
HSV	hsv(181, 64%, 25%)
CMYK	cmyk(64.1%, 1.6%, 0%, 74.9%)
CIE-LAB	lab(24.02, -13.52, -4.84)
CIE-LCH	lch(24.02, 14.36, 199.71°)
OKLab	oklab(33.99% -0.0425 -0.0134)
OKLCH	oklch(33.99% 0.045 197.5)
XYZ	xyz(3.0559, 4.1070, 5.4812)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F40 #401817

analogous

#17402D #173F40 #172B40

triadic

#173F40 #40173F #3F4017

tetradic

#173F40 #2D1740 #401817 #2B4017

square

#173F40 #2D1740 #401817 #2B4017

split-complementary

#173F40 #40172B #402D17

monochromatic

#081617 #081617 #173F40 #276B6D #37989A

Accessibility & contrast

On white

11.53

#173F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F40

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F40	#FFFFFF	#000000	##FFFFFF
##173F40	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B3C40

Deuteranopia (green-blind)

#343740

Tritanopia (blue-blind)

#00413F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173f40;
/* rgb */ color: rgb(23, 63, 64);
/* oklch */ color: oklch(34.0% 0.045 197.5);

Tailwind

colors: {
  custom: {
    50: '#597474',
    500: '#173f40',
    950: '#000000',
  },
}

SCSS

$custom: #173f40;
$custom-light: #597474;
$custom-dark: #000000;

JSON

{
  "hex": "#173f40",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 64
  },
  "hsl": {
    "h": 181.463,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.33992,
    "c": 0.04453,
    "h": 197.5
  },
  "luminance": 0.04107
}

Semantic roles & 50–950 ramp

primary

#173F40

secondary

#773D3C

accent

#5451D7

background

#F5F7F7

surface

#E9EDED

border

#C5C8C8

text

#040808

muted

#797B7B

Preview Lab

Preview with #173F40

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

Preview Lab → · Contrast checker → · Palette generator →