#173C5B#173C5B

#173C5B is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.6% C 0.069 H 246.8°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#173C5B
RGB	rgb(23, 60, 91)
HSL	hsl(207, 60%, 22%)
HSV	hsv(207, 75%, 36%)
CMYK	cmyk(74.7%, 34.1%, 0%, 64.3%)
CIE-LAB	lab(24.22, -1.55, -22.36)
CIE-LCH	lch(24.22, 22.41, 266.03°)
OKLab	oklab(34.56% -0.0271 -0.0633)
OKLCH	oklch(34.56% 0.069 246.8)
XYZ	xyz(3.8568, 4.1688, 10.4969)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C5B #5B3617

analogous

#175B58 #173C5B #171A5B

triadic

#173C5B #5B173C #3C5B17

tetradic

#173C5B #58175B #5B3617 #1A5B17

square

#173C5B #58175B #5B3617 #1A5B17

split-complementary

#173C5B #5B171A #5B5817

monochromatic

#061018 #0B1C2A #173C5B #235C8C #307CBD

Accessibility & contrast

On white

11.45

#173C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#173C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C5B

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C5B	#FFFFFF	#000000	##FFFFFF
##173C5B	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3D5C

Deuteranopia (green-blind)

#25375A

Tritanopia (blue-blind)

#004347

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173c5b;
/* rgb */ color: rgb(23, 60, 91);
/* oklch */ color: oklch(34.6% 0.069 246.8);

Tailwind

colors: {
  custom: {
    50: '#5e7189',
    500: '#173c5b',
    950: '#000000',
  },
}

SCSS

$custom: #173c5b;
$custom-light: #5e7189;
$custom-dark: #000000;

JSON

{
  "hex": "#173c5b",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 91
  },
  "hsl": {
    "h": 207.353,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.34562,
    "c": 0.06885,
    "h": 246.8
  },
  "luminance": 0.04169
}

Semantic roles & 50–950 ramp

primary

#173C5B

secondary

#92633C

accent

#8D45E3

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173C5B

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

Preview Lab → · Contrast checker → · Palette generator →