#173D89#173D89

#173D89 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.134 H 262.2°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#173D89
RGB	rgb(23, 61, 137)
HSL	hsl(220, 71%, 31%)
HSV	hsv(220, 83%, 54%)
CMYK	cmyk(83.2%, 55.5%, 0%, 46.3%)
CIE-LAB	lab(27.64, 16.73, -46.15)
CIE-LCH	lch(27.64, 49.09, 289.93°)
OKLab	oklab(38.2% -0.0183 -0.1331)
OKLCH	oklch(38.2% 0.134 262.2)
XYZ	xyz(6.5358, 5.3250, 24.3454)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D89 #896317

analogous

#177689 #173D89 #2A1789

triadic

#173D89 #89173D #3D8917

tetradic

#173D89 #891776 #896317 #17892A

square

#173D89 #891776 #896317 #17892A

split-complementary

#173D89 #892A17 #768917

monochromatic

#050E20 #0E2655 #173D89 #2054BD #3C72DE

Accessibility & contrast

On white

10.17

#173D89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#173D89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D89

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D89	#FFFFFF	#000000	##FFFFFF
##173D89	1.00	10.17	2.07	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478C

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173d89;
/* rgb */ color: rgb(23, 61, 137);
/* oklch */ color: oklch(38.2% 0.134 262.2);

Tailwind

colors: {
  custom: {
    50: '#6971ac',
    500: '#173d89',
    950: '#000000',
  },
}

SCSS

$custom: #173d89;
$custom-light: #6971ac;
$custom-dark: #000000;

JSON

{
  "hex": "#173d89",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 137
  },
  "hsl": {
    "h": 220,
    "s": 71.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38202,
    "c": 0.13438,
    "h": 262.2
  },
  "luminance": 0.05326
}

Semantic roles & 50–950 ramp

primary

#173D89

secondary

#BD933F

accent

#B23AEE

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173D89

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

Preview Lab → · Contrast checker → · Palette generator →