#173990#173990

#173990 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.0% C 0.149 H 264.2°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#173990
RGB	rgb(23, 57, 144)
HSL	hsl(223, 72%, 33%)
HSV	hsv(223, 84%, 56%)
CMYK	cmyk(84%, 60.4%, 0%, 43.5%)
CIE-LAB	lab(27.08, 22.38, -51.39)
CIE-LCH	lch(27.08, 56.05, 293.54°)
OKLab	oklab(37.96% -0.0151 -0.1486)
OKLCH	oklch(37.96% 0.149 264.2)
XYZ	xyz(6.8487, 5.1212, 27.0077)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173990 #906E17

analogous

#177690 #173990 #311790

triadic

#173990 #901739 #399017

tetradic

#173990 #901776 #906E17 #179031

square

#173990 #901776 #906E17 #179031

split-complementary

#173990 #903117 #769017

monochromatic

#060F26 #0F245B #173990 #1F4EC5 #416EE1

Accessibility & contrast

On white

10.37

#173990 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#173990 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173990

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173990	#FFFFFF	#000000	##FFFFFF
##173990	1.00	10.37	2.02	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004693

Deuteranopia (green-blind)

#003B8E

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173990;
/* rgb */ color: rgb(23, 57, 144);
/* oklch */ color: oklch(38.0% 0.149 264.2);

Tailwind

colors: {
  custom: {
    50: '#6b6eb1',
    500: '#173990',
    950: '#000000',
  },
}

SCSS

$custom: #173990;
$custom-light: #6b6eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#173990",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 144
  },
  "hsl": {
    "h": 223.14,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37957,
    "c": 0.14938,
    "h": 264.2
  },
  "luminance": 0.05122
}

Semantic roles & 50–950 ramp

primary

#173990

secondary

#C19D42

accent

#BC39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #173990

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

Preview Lab → · Contrast checker → · Palette generator →