#173789#173789

#173789 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.142 H 264.3°. Best body text is #FFFFFF at 10.80:1 contrast (WCAG AA passes).

Color values

HEX	#173789
RGB	rgb(23, 55, 137)
HSL	hsl(223, 71%, 31%)
HSV	hsv(223, 83%, 54%)
CMYK	cmyk(83.2%, 59.9%, 0%, 46.3%)
CIE-LAB	lab(25.92, 20.94, -48.94)
CIE-LCH	lch(25.92, 53.23, 293.16°)
OKLab	oklab(36.9% -0.0142 -0.1415)
OKLCH	oklch(36.9% 0.142 264.3)
XYZ	xyz(6.2333, 4.7199, 24.2446)
Luminance	0.0472 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173789 #896917

analogous

#177089 #173789 #301789

triadic

#173789 #891737 #378917

tetradic

#173789 #891770 #896917 #178930

square

#173789 #891770 #896917 #178930

split-complementary

#173789 #893017 #708917

monochromatic

#050D20 #0E2255 #173789 #204CBD #3C6ADE

Accessibility & contrast

On white

10.80

#173789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#173789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173789

10.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173789	#FFFFFF	#000000	##FFFFFF
##173789	1.00	10.80	1.94	10.80
#FFFFFF	10.80	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438C

Deuteranopia (green-blind)

#003887

Tritanopia (blue-blind)

#004C5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173789;
/* rgb */ color: rgb(23, 55, 137);
/* oklch */ color: oklch(36.9% 0.142 264.3);

Tailwind

colors: {
  custom: {
    50: '#696dac',
    500: '#173789',
    950: '#000000',
  },
}

SCSS

$custom: #173789;
$custom-light: #696dac;
$custom-dark: #000000;

JSON

{
  "hex": "#173789",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 137
  },
  "hsl": {
    "h": 223.158,
    "s": 71.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36904,
    "c": 0.14217,
    "h": 264.3
  },
  "luminance": 0.04721
}

Semantic roles & 50–950 ramp

primary

#173789

secondary

#BD993F

accent

#BB3AEE

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173789

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

Preview Lab → · Contrast checker → · Palette generator →