#173D90#173D90

#173D90 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.144 H 262.9°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#173D90
RGB	rgb(23, 61, 144)
HSL	hsl(221, 72%, 33%)
HSV	hsv(221, 84%, 56%)
CMYK	cmyk(84%, 57.6%, 0%, 43.5%)
CIE-LAB	lab(28.20, 19.60, -49.56)
CIE-LCH	lch(28.20, 53.30, 291.58°)
OKLab	oklab(38.8% -0.0177 -0.1432)
OKLCH	oklch(38.8% 0.144 262.9)
XYZ	xyz(7.0543, 5.5324, 27.0762)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D90 #906A17

analogous

#177990 #173D90 #2D1790

triadic

#173D90 #90173D #3D9017

tetradic

#173D90 #901779 #906A17 #17902D

square

#173D90 #901779 #906A17 #17902D

split-complementary

#173D90 #902D17 #799017

monochromatic

#061026 #0F275B #173D90 #1F53C5 #4173E1

Accessibility & contrast

On white

9.97

#173D90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#173D90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D90

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D90	#FFFFFF	#000000	##FFFFFF
##173D90	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003D8E

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #173d90;
/* rgb */ color: rgb(23, 61, 144);
/* oklch */ color: oklch(38.8% 0.144 262.9);

Tailwind

colors: {
  custom: {
    50: '#6b71b1',
    500: '#173d90',
    950: '#000000',
  },
}

SCSS

$custom: #173d90;
$custom-light: #6b71b1;
$custom-dark: #000000;

JSON

{
  "hex": "#173d90",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 144
  },
  "hsl": {
    "h": 221.157,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38801,
    "c": 0.14425,
    "h": 262.9
  },
  "luminance": 0.05533
}

Semantic roles & 50–950 ramp

primary

#173D90

secondary

#C19942

accent

#B639EF

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #173D90

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

Preview Lab → · Contrast checker → · Palette generator →