#173D5A#173D5A

#173D5A is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.8% C 0.067 H 244.6°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#173D5A
RGB	rgb(23, 61, 90)
HSL	hsl(206, 59%, 22%)
HSV	hsv(206, 74%, 35%)
CMYK	cmyk(74.4%, 32.2%, 0%, 64.7%)
CIE-LAB	lab(24.50, -2.62, -21.26)
CIE-LCH	lch(24.50, 21.42, 262.97°)
OKLab	oklab(34.77% -0.0286 -0.0601)
OKLCH	oklch(34.77% 0.067 244.6)
XYZ	xyz(3.8669, 4.2574, 10.2888)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D5A #5A3417

analogous

#175A56 #173D5A #171C5A

triadic

#173D5A #5A173D #3D5A17

tetradic

#173D5A #56175A #5A3417 #1C5A17

square

#173D5A #56175A #5A3417 #1C5A17

split-complementary

#173D5A #5A171C #5A5617

monochromatic

#061118 #0B1C29 #173D5A #235E8B #307FBB

Accessibility & contrast

On white

11.34

#173D5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#173D5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D5A

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D5A	#FFFFFF	#000000	##FFFFFF
##173D5A	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303E5B

Deuteranopia (green-blind)

#273759

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173d5a;
/* rgb */ color: rgb(23, 61, 90);
/* oklch */ color: oklch(34.8% 0.067 244.6);

Tailwind

colors: {
  custom: {
    50: '#5d7289',
    500: '#173d5a',
    950: '#000000',
  },
}

SCSS

$custom: #173d5a;
$custom-light: #5d7289;
$custom-dark: #000000;

JSON

{
  "hex": "#173d5a",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 90
  },
  "hsl": {
    "h": 205.97,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.34768,
    "c": 0.06653,
    "h": 244.6
  },
  "luminance": 0.04258
}

Semantic roles & 50–950 ramp

primary

#173D5A

secondary

#91613C

accent

#8945E2

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173D5A

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

Preview Lab → · Contrast checker → · Palette generator →