#173C40#173C40

#173C40 is a dark, muted teal. Relative luminance 0.038; OKLCH L 33.1% C 0.042 H 204.9°. Best body text is #FFFFFF at 11.95:1 contrast (WCAG AA passes).

Color values

HEX	#173C40
RGB	rgb(23, 60, 64)
HSL	hsl(186, 47%, 17%)
HSV	hsv(186, 64%, 25%)
CMYK	cmyk(64.1%, 6.2%, 0%, 74.9%)
CIE-LAB	lab(22.94, -11.72, -6.46)
CIE-LCH	lch(22.94, 13.39, 208.86°)
OKLab	oklab(33.12% -0.0385 -0.0179)
OKLCH	oklch(33.12% 0.042 204.9)
XYZ	xyz(2.8942, 3.7838, 5.4273)
Luminance	0.0378 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C40 #401B17

analogous

#174030 #173C40 #172840

triadic

#173C40 #40173C #3C4017

tetradic

#173C40 #301740 #401B17 #284017

square

#173C40 #301740 #401B17 #284017

split-complementary

#173C40 #401728 #403017

monochromatic

#081517 #081517 #173C40 #27666D #37909A

Accessibility & contrast

On white

11.95

#173C40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#173C40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C40

11.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C40	#FFFFFF	#000000	##FFFFFF
##173C40	1.00	11.95	1.76	11.95
#FFFFFF	11.95	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373940

Deuteranopia (green-blind)

#313540

Tritanopia (blue-blind)

#003F3D

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173c40;
/* rgb */ color: rgb(23, 60, 64);
/* oklch */ color: oklch(33.1% 0.042 204.9);

Tailwind

colors: {
  custom: {
    50: '#597174',
    500: '#173c40',
    950: '#000000',
  },
}

SCSS

$custom: #173c40;
$custom-light: #597174;
$custom-dark: #000000;

JSON

{
  "hex": "#173c40",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 64
  },
  "hsl": {
    "h": 185.854,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.33123,
    "c": 0.04244,
    "h": 204.9
  },
  "luminance": 0.03784
}

Semantic roles & 50–950 ramp

primary

#173C40

secondary

#77423C

accent

#5E51D7

background

#F5F6F7

surface

#E9ECED

border

#C5C7C8

text

#040708

muted

#797A7B

Preview Lab

Preview with #173C40

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

Preview Lab → · Contrast checker → · Palette generator →