#173C53#173C53

#173C53 is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.1% C 0.058 H 239.1°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#173C53
RGB	rgb(23, 60, 83)
HSL	hsl(203, 57%, 21%)
HSV	hsv(203, 72%, 33%)
CMYK	cmyk(72.3%, 27.7%, 0%, 67.5%)
CIE-LAB	lab(23.80, -4.72, -17.78)
CIE-LCH	lch(23.80, 18.39, 255.13°)
OKLab	oklab(34.09% -0.03 -0.05)
OKLCH	oklch(34.09% 0.058 239.1)
XYZ	xyz(3.5299, 4.0380, 8.7753)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C53 #532E17

analogous

#17534C #173C53 #171E53

triadic

#173C53 #53173C #3C5317

tetradic

#173C53 #4C1753 #532E17 #1E5317

square

#173C53 #4C1753 #532E17 #1E5317

split-complementary

#173C53 #53171E #534C17

monochromatic

#071118 #0A1923 #173C53 #245F83 #3281B3

Accessibility & contrast

On white

11.62

#173C53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#173C53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C53

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C53	#FFFFFF	#000000	##FFFFFF
##173C53	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313C54

Deuteranopia (green-blind)

#293653

Tritanopia (blue-blind)

#004244

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173c53;
/* rgb */ color: rgb(23, 60, 83);
/* oklch */ color: oklch(34.1% 0.058 239.1);

Tailwind

colors: {
  custom: {
    50: '#5c7183',
    500: '#173c53',
    950: '#000000',
  },
}

SCSS

$custom: #173c53;
$custom-light: #5c7183;
$custom-dark: #000000;

JSON

{
  "hex": "#173c53",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 83
  },
  "hsl": {
    "h": 203,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.34087,
    "c": 0.0583,
    "h": 239.1
  },
  "luminance": 0.04038
}

Semantic roles & 50–950 ramp

primary

#173C53

secondary

#8A5A3C

accent

#8248E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173C53

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

Preview Lab → · Contrast checker → · Palette generator →