#173A90#173A90

#173A90 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.148 H 263.9°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#173A90
RGB	rgb(23, 58, 144)
HSL	hsl(223, 72%, 33%)
HSV	hsv(223, 84%, 56%)
CMYK	cmyk(84%, 59.7%, 0%, 43.5%)
CIE-LAB	lab(27.36, 21.69, -50.94)
CIE-LCH	lch(27.36, 55.36, 293.07°)
OKLab	oklab(38.17% -0.0158 -0.1473)
OKLCH	oklch(38.17% 0.148 263.9)
XYZ	xyz(6.8987, 5.2210, 27.0243)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A90 #906D17

analogous

#177690 #173A90 #311790

triadic

#173A90 #90173A #3A9017

tetradic

#173A90 #901776 #906D17 #179031

square

#173A90 #901776 #906D17 #179031

split-complementary

#173A90 #903117 #769017

monochromatic

#060F26 #0F255B #173A90 #1F4FC5 #416FE1

Accessibility & contrast

On white

10.27

#173A90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#173A90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A90

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A90	#FFFFFF	#000000	##FFFFFF
##173A90	1.00	10.27	2.04	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004693

Deuteranopia (green-blind)

#003B8E

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173a90;
/* rgb */ color: rgb(23, 58, 144);
/* oklch */ color: oklch(38.2% 0.148 263.9);

Tailwind

colors: {
  custom: {
    50: '#6b6fb1',
    500: '#173a90',
    950: '#000000',
  },
}

SCSS

$custom: #173a90;
$custom-light: #6b6fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#173a90",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 144
  },
  "hsl": {
    "h": 222.645,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38165,
    "c": 0.1481,
    "h": 263.9
  },
  "luminance": 0.05222
}

Semantic roles & 50–950 ramp

primary

#173A90

secondary

#C19C42

accent

#BA39EF

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #173A90

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

Preview Lab → · Contrast checker → · Palette generator →