#173573#173573

#173573 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.113 H 262.6°. Best body text is #FFFFFF at 11.71:1 contrast (WCAG AA passes).

Color values

HEX	#173573
RGB	rgb(23, 53, 115)
HSL	hsl(220, 67%, 27%)
HSV	hsv(220, 80%, 45%)
CMYK	cmyk(80%, 53.9%, 0%, 54.9%)
CIE-LAB	lab(23.56, 13.28, -38.93)
CIE-LCH	lch(23.56, 41.13, 288.83°)
OKLab	oklab(34.56% -0.0145 -0.112)
OKLCH	oklch(34.56% 0.113 262.6)
XYZ	xyz(4.7199, 3.9656, 16.7330)
Luminance	0.0397 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173573 #735517

analogous

#176373 #173573 #271773

triadic

#173573 #731735 #357317

tetradic

#173573 #731763 #735517 #177327

square

#173573 #731763 #735517 #177327

split-complementary

#173573 #732717 #637317

monochromatic

#050C1A #0D1D40 #173573 #214DA6 #2F65D5

Accessibility & contrast

On white

11.71

#173573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#173573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173573

11.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173573	#FFFFFF	#000000	##FFFFFF
##173573	1.00	11.71	1.79	11.71
#FFFFFF	11.71	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C3D75

Deuteranopia (green-blind)

#003472

Tritanopia (blue-blind)

#00444E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173573;
/* rgb */ color: rgb(23, 53, 115);
/* oklch */ color: oklch(34.6% 0.113 262.6);

Tailwind

colors: {
  custom: {
    50: '#636b9c',
    500: '#173573',
    950: '#000000',
  },
}

SCSS

$custom: #173573;
$custom-light: #636b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#173573",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 115
  },
  "hsl": {
    "h": 220.435,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.34558,
    "c": 0.11298,
    "h": 262.6
  },
  "luminance": 0.03966
}

Semantic roles & 50–950 ramp

primary

#173573

secondary

#A9863D

accent

#B23EEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #173573

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

Preview Lab → · Contrast checker → · Palette generator →