#173D55#173D55

#173D55 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.5% C 0.060 H 239.6°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#173D55
RGB	rgb(23, 61, 85)
HSL	hsl(203, 57%, 21%)
HSV	hsv(203, 73%, 33%)
CMYK	cmyk(72.9%, 28.2%, 0%, 66.7%)
CIE-LAB	lab(24.24, -4.60, -18.40)
CIE-LCH	lch(24.24, 18.96, 255.97°)
OKLab	oklab(34.47% -0.0304 -0.0518)
OKLCH	oklch(34.47% 0.06 239.6)
XYZ	xyz(3.6612, 4.1751, 9.2055)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D55 #552F17

analogous

#17554E #173D55 #171E55

triadic

#173D55 #55173D #3D5517

tetradic

#173D55 #4E1755 #552F17 #1E5517

square

#173D55 #4E1755 #552F17 #1E5517

split-complementary

#173D55 #55171E #554E17

monochromatic

#071118 #0A1A25 #173D55 #246085 #3182B5

Accessibility & contrast

On white

11.44

#173D55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#173D55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D55

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D55	#FFFFFF	#000000	##FFFFFF
##173D55	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323D56

Deuteranopia (green-blind)

#293755

Tritanopia (blue-blind)

#004345

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173d55;
/* rgb */ color: rgb(23, 61, 85);
/* oklch */ color: oklch(34.5% 0.060 239.6);

Tailwind

colors: {
  custom: {
    50: '#5c7285',
    500: '#173d55',
    950: '#000000',
  },
}

SCSS

$custom: #173d55;
$custom-light: #5c7285;
$custom-dark: #000000;

JSON

{
  "hex": "#173d55",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 85
  },
  "hsl": {
    "h": 203.226,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34474,
    "c": 0.06006,
    "h": 239.6
  },
  "luminance": 0.04176
}

Semantic roles & 50–950 ramp

primary

#173D55

secondary

#8C5B3C

accent

#8347E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #173D55

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

Preview Lab → · Contrast checker → · Palette generator →