#173C90#173C90

#173C90 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.146 H 263.3°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#173C90
RGB	rgb(23, 60, 144)
HSL	hsl(222, 72%, 33%)
HSV	hsv(222, 84%, 56%)
CMYK	cmyk(84%, 58.3%, 0%, 43.5%)
CIE-LAB	lab(27.92, 20.30, -50.02)
CIE-LCH	lch(27.92, 53.98, 292.09°)
OKLab	oklab(38.59% -0.0171 -0.1445)
OKLCH	oklch(38.59% 0.146 263.3)
XYZ	xyz(7.0014, 5.4266, 27.0586)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C90 #906B17

analogous

#177890 #173C90 #2F1790

triadic

#173C90 #90173C #3C9017

tetradic

#173C90 #901778 #906B17 #17902F

square

#173C90 #901778 #906B17 #17902F

split-complementary

#173C90 #902F17 #789017

monochromatic

#061026 #0F265B #173C90 #1F52C5 #4172E1

Accessibility & contrast

On white

10.07

#173C90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#173C90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C90

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C90	#FFFFFF	#000000	##FFFFFF
##173C90	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003D8E

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #173c90;
/* rgb */ color: rgb(23, 60, 144);
/* oklch */ color: oklch(38.6% 0.146 263.3);

Tailwind

colors: {
  custom: {
    50: '#6b71b1',
    500: '#173c90',
    950: '#000000',
  },
}

SCSS

$custom: #173c90;
$custom-light: #6b71b1;
$custom-dark: #000000;

JSON

{
  "hex": "#173c90",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 144
  },
  "hsl": {
    "h": 221.653,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38587,
    "c": 0.14553,
    "h": 263.3
  },
  "luminance": 0.05427
}

Semantic roles & 50–950 ramp

primary

#173C90

secondary

#C19A42

accent

#B739EF

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #173C90

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

Preview Lab → · Contrast checker → · Palette generator →