#173E89#173E89

#173E89 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.133 H 261.8°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#173E89
RGB	rgb(23, 62, 137)
HSL	hsl(219, 71%, 31%)
HSV	hsv(219, 83%, 54%)
CMYK	cmyk(83.2%, 54.7%, 0%, 46.3%)
CIE-LAB	lab(27.93, 16.04, -45.67)
CIE-LCH	lch(27.93, 48.41, 289.35°)
OKLab	oklab(38.42% -0.0191 -0.1317)
OKLCH	oklch(38.42% 0.133 261.8)
XYZ	xyz(6.5897, 5.4328, 24.3634)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E89 #896217

analogous

#177789 #173E89 #291789

triadic

#173E89 #89173E #3E8917

tetradic

#173E89 #891777 #896217 #178929

square

#173E89 #891777 #896217 #178929

split-complementary

#173E89 #892917 #778917

monochromatic

#050F20 #0E2655 #173E89 #2056BD #3C74DE

Accessibility & contrast

On white

10.06

#173E89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#173E89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E89

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E89	#FFFFFF	#000000	##FFFFFF
##173E89	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03478C

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #173e89;
/* rgb */ color: rgb(23, 62, 137);
/* oklch */ color: oklch(38.4% 0.133 261.8);

Tailwind

colors: {
  custom: {
    50: '#6972ac',
    500: '#173e89',
    950: '#000000',
  },
}

SCSS

$custom: #173e89;
$custom-light: #6972ac;
$custom-dark: #000000;

JSON

{
  "hex": "#173e89",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 137
  },
  "hsl": {
    "h": 219.474,
    "s": 71.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38424,
    "c": 0.13308,
    "h": 261.8
  },
  "luminance": 0.05434
}

Semantic roles & 50–950 ramp

primary

#173E89

secondary

#BD923F

accent

#B03AEE

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173E89

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

Preview Lab → · Contrast checker → · Palette generator →