#173588#173588

#173588 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.143 H 264.8°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#173588
RGB	rgb(23, 53, 136)
HSL	hsl(224, 71%, 31%)
HSV	hsv(224, 83%, 53%)
CMYK	cmyk(83.1%, 61%, 0%, 46.7%)
CIE-LAB	lab(25.28, 21.93, -49.37)
CIE-LCH	lch(25.28, 54.03, 293.95°)
OKLab	oklab(36.39% -0.0129 -0.1427)
OKLCH	oklch(36.39% 0.143 264.8)
XYZ	xyz(6.0688, 4.5052, 23.8375)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173588 #886A17

analogous

#176D88 #173588 #311788

triadic

#173588 #881735 #358817

tetradic

#173588 #88176D #886A17 #178831

square

#173588 #88176D #886A17 #178831

split-complementary

#173588 #883117 #6D8817

monochromatic

#050C1F #0E2154 #173588 #2049BC #3B67DE

Accessibility & contrast

On white

11.05

#173588 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#173588 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173588

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173588	#FFFFFF	#000000	##FFFFFF
##173588	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418B

Deuteranopia (green-blind)

#003786

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173588;
/* rgb */ color: rgb(23, 53, 136);
/* oklch */ color: oklch(36.4% 0.143 264.8);

Tailwind

colors: {
  custom: {
    50: '#696bab',
    500: '#173588',
    950: '#000000',
  },
}

SCSS

$custom: #173588;
$custom-light: #696bab;
$custom-dark: #000000;

JSON

{
  "hex": "#173588",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 136
  },
  "hsl": {
    "h": 224.071,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.36394,
    "c": 0.14333,
    "h": 264.8
  },
  "luminance": 0.04506
}

Semantic roles & 50–950 ramp

primary

#173588

secondary

#BC9B3F

accent

#BE3AEE

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #173588

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

Preview Lab → · Contrast checker → · Palette generator →