#173E88#173E88

#173E88 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.132 H 261.6°. Best body text is #FFFFFF at 10.09:1 contrast (WCAG AA passes).

Color values

HEX	#173E88
RGB	rgb(23, 62, 136)
HSL	hsl(219, 71%, 31%)
HSV	hsv(219, 83%, 53%)
CMYK	cmyk(83.1%, 54.4%, 0%, 46.7%)
CIE-LAB	lab(27.86, 15.62, -45.18)
CIE-LCH	lch(27.86, 47.80, 289.08°)
OKLab	oklab(38.34% -0.0192 -0.1302)
OKLCH	oklch(38.34% 0.132 261.6)
XYZ	xyz(6.5183, 5.4042, 23.9873)
Luminance	0.0541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E88 #886117

analogous

#177688 #173E88 #281788

triadic

#173E88 #88173E #3E8817

tetradic

#173E88 #881776 #886117 #178828

square

#173E88 #881776 #886117 #178828

split-complementary

#173E88 #882817 #768817

monochromatic

#050E1F #0E2654 #173E88 #2056BC #3B74DE

Accessibility & contrast

On white

10.09

#173E88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#173E88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E88

10.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E88	#FFFFFF	#000000	##FFFFFF
##173E88	1.00	10.09	2.08	10.09
#FFFFFF	10.09	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05478B

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #173e88;
/* rgb */ color: rgb(23, 62, 136);
/* oklch */ color: oklch(38.3% 0.132 261.6);

Tailwind

colors: {
  custom: {
    50: '#6872ab',
    500: '#173e88',
    950: '#000000',
  },
}

SCSS

$custom: #173e88;
$custom-light: #6872ab;
$custom-dark: #000000;

JSON

{
  "hex": "#173e88",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 136
  },
  "hsl": {
    "h": 219.292,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38341,
    "c": 0.13165,
    "h": 261.6
  },
  "luminance": 0.05405
}

Semantic roles & 50–950 ramp

primary

#173E88

secondary

#BC913F

accent

#B03AEE

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173E88

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

Preview Lab → · Contrast checker → · Palette generator →