#173B56#173B56

#173B56 is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.063 H 243.9°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#173B56
RGB	rgb(23, 59, 86)
HSL	hsl(206, 58%, 21%)
HSV	hsv(206, 73%, 34%)
CMYK	cmyk(73.3%, 31.4%, 0%, 66.3%)
CIE-LAB	lab(23.61, -2.88, -20.04)
CIE-LCH	lch(23.61, 20.25, 261.84°)
OKLab	oklab(33.99% -0.0277 -0.0566)
OKLCH	oklch(33.99% 0.063 243.9)
XYZ	xyz(3.5964, 3.9816, 9.3813)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B56 #563217

analogous

#175652 #173B56 #171C56

triadic

#173B56 #56173B #3B5617

tetradic

#173B56 #521756 #563217 #1C5617

square

#173B56 #521756 #563217 #1C5617

split-complementary

#173B56 #56171C #565217

monochromatic

#061118 #0A1A26 #173B56 #245C86 #317DB7

Accessibility & contrast

On white

11.69

#173B56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#173B56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B56

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B56	#FFFFFF	#000000	##FFFFFF
##173B56	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3C57

Deuteranopia (green-blind)

#263555

Tritanopia (blue-blind)

#004244

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b56;
/* rgb */ color: rgb(23, 59, 86);
/* oklch */ color: oklch(34.0% 0.063 243.9);

Tailwind

colors: {
  custom: {
    50: '#5c7085',
    500: '#173b56',
    950: '#000000',
  },
}

SCSS

$custom: #173b56;
$custom-light: #5c7085;
$custom-dark: #000000;

JSON

{
  "hex": "#173b56",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 86
  },
  "hsl": {
    "h": 205.714,
    "s": 57.798,
    "l": 21.373
  },
  "oklch": {
    "l": 0.33991,
    "c": 0.06297,
    "h": 243.9
  },
  "luminance": 0.03982
}

Semantic roles & 50–950 ramp

primary

#173B56

secondary

#8D5F3C

accent

#8947E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173B56

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

Preview Lab → · Contrast checker → · Palette generator →