#173B40#173B40

#173B40 is a dark, muted teal. Relative luminance 0.037; OKLCH L 32.8% C 0.042 H 207.5°. Best body text is #FFFFFF at 12.10:1 contrast (WCAG AA passes).

Color values

HEX	#173B40
RGB	rgb(23, 59, 64)
HSL	hsl(187, 47%, 17%)
HSV	hsv(187, 64%, 25%)
CMYK	cmyk(64.1%, 7.8%, 0%, 74.9%)
CIE-LAB	lab(22.58, -11.11, -7.00)
CIE-LCH	lch(22.58, 13.13, 212.22°)
OKLab	oklab(32.83% -0.0372 -0.0194)
OKLCH	oklch(32.83% 0.042 207.5)
XYZ	xyz(2.8424, 3.6800, 5.4100)
Luminance	0.0368 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B40 #401C17

analogous

#174031 #173B40 #172740

triadic

#173B40 #40173B #3B4017

tetradic

#173B40 #311740 #401C17 #274017

square

#173B40 #311740 #401C17 #274017

split-complementary

#173B40 #401727 #403117

monochromatic

#081517 #081517 #173B40 #27656D #378E9A

Accessibility & contrast

On white

12.10

#173B40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#173B40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B40

12.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B40	#FFFFFF	#000000	##FFFFFF
##173B40	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)

#363940

Deuteranopia (green-blind)

#303440

Tritanopia (blue-blind)

#003E3C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #173b40;
/* rgb */ color: rgb(23, 59, 64);
/* oklch */ color: oklch(32.8% 0.042 207.5);

Tailwind

colors: {
  custom: {
    50: '#597174',
    500: '#173b40',
    950: '#000000',
  },
}

SCSS

$custom: #173b40;
$custom-light: #597174;
$custom-dark: #000000;

JSON

{
  "hex": "#173b40",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 64
  },
  "hsl": {
    "h": 187.317,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.32834,
    "c": 0.04191,
    "h": 207.5
  },
  "luminance": 0.0368
}

Semantic roles & 50–950 ramp

primary

#173B40

secondary

#77433C

accent

#6151D7

background

#F5F6F7

surface

#E9ECED

border

#C5C7C8

text

#040708

muted

#797A7B

Preview Lab

Preview with #173B40

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

Preview Lab → · Contrast checker → · Palette generator →