#173370#173370

#173370 is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.8% C 0.111 H 263.2°. Best body text is #FFFFFF at 12.04:1 contrast (WCAG AA passes).

Color values

HEX	#173370
RGB	rgb(23, 51, 112)
HSL	hsl(221, 66%, 26%)
HSV	hsv(221, 79%, 44%)
CMYK	cmyk(79.5%, 54.5%, 0%, 56.1%)
CIE-LAB	lab(22.72, 13.46, -38.36)
CIE-LCH	lch(22.72, 40.65, 289.33°)
OKLab	oklab(33.85% -0.0132 -0.1104)
OKLCH	oklch(33.85% 0.111 263.2)
XYZ	xyz(4.4608, 3.7192, 15.8089)
Luminance	0.0372 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173370 #705417

analogous

#176070 #173370 #281770

triadic

#173370 #701733 #337017

tetradic

#173370 #701760 #705417 #177028

square

#173370 #701760 #705417 #177028

split-complementary

#173370 #702817 #607017

monochromatic

#050C19 #0D1C3D #173370 #214AA3 #2D62D4

Accessibility & contrast

On white

12.04

#173370 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#173370 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173370

12.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173370	#FFFFFF	#000000	##FFFFFF
##173370	1.00	12.04	1.74	12.04
#FFFFFF	12.04	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A3B72

Deuteranopia (green-blind)

#00326F

Tritanopia (blue-blind)

#00424C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #173370;
/* rgb */ color: rgb(23, 51, 112);
/* oklch */ color: oklch(33.8% 0.111 263.2);

Tailwind

colors: {
  custom: {
    50: '#636a9a',
    500: '#173370',
    950: '#000000',
  },
}

SCSS

$custom: #173370;
$custom-light: #636a9a;
$custom-dark: #000000;

JSON

{
  "hex": "#173370",
  "rgb": {
    "r": 23,
    "g": 51,
    "b": 112
  },
  "hsl": {
    "h": 221.124,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.33847,
    "c": 0.11121,
    "h": 263.2
  },
  "luminance": 0.0372
}

Semantic roles & 50–950 ramp

primary

#173370

secondary

#A6853D

accent

#B33FE9

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #173370

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

Preview Lab → · Contrast checker → · Palette generator →