#173C56#173C56

#173C56 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.3% C 0.062 H 242.3°. Best body text is #FFFFFF at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#173C56
RGB	rgb(23, 60, 86)
HSL	hsl(205, 58%, 21%)
HSV	hsv(205, 73%, 34%)
CMYK	cmyk(73.3%, 30.2%, 0%, 66.3%)
CIE-LAB	lab(23.95, -3.54, -19.51)
CIE-LCH	lch(23.95, 19.83, 259.71°)
OKLab	oklab(34.26% -0.0288 -0.055)
OKLCH	oklch(34.26% 0.062 242.3)
XYZ	xyz(3.6483, 4.0854, 9.3986)
Luminance	0.0409 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C56 #563117

analogous

#175651 #173C56 #171D56

triadic

#173C56 #56173C #3C5617

tetradic

#173C56 #511756 #563117 #1D5617

square

#173C56 #511756 #563117 #1D5617

split-complementary

#173C56 #56171D #565117

monochromatic

#061118 #0A1A26 #173C56 #245E86 #317FB7

Accessibility & contrast

On white

11.56

#173C56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173C56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C56

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C56	#FFFFFF	#000000	##FFFFFF
##173C56	1.00	11.56	1.82	11.56
#FFFFFF	11.56	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303C57

Deuteranopia (green-blind)

#283656

Tritanopia (blue-blind)

#004245

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173c56;
/* rgb */ color: rgb(23, 60, 86);
/* oklch */ color: oklch(34.3% 0.062 242.3);

Tailwind

colors: {
  custom: {
    50: '#5d7185',
    500: '#173c56',
    950: '#000000',
  },
}

SCSS

$custom: #173c56;
$custom-light: #5d7185;
$custom-dark: #000000;

JSON

{
  "hex": "#173c56",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 86
  },
  "hsl": {
    "h": 204.762,
    "s": 57.798,
    "l": 21.373
  },
  "oklch": {
    "l": 0.34261,
    "c": 0.06211,
    "h": 242.3
  },
  "luminance": 0.04086
}

Semantic roles & 50–950 ramp

primary

#173C56

secondary

#8D5D3C

accent

#8647E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173C56

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

Preview Lab → · Contrast checker → · Palette generator →