#173584#173584

#173584 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.0% C 0.138 H 264.5°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#173584
RGB	rgb(23, 53, 132)
HSL	hsl(223, 70%, 30%)
HSV	hsv(223, 83%, 52%)
CMYK	cmyk(82.6%, 59.8%, 0%, 48.2%)
CIE-LAB	lab(24.93, 20.30, -47.44)
CIE-LCH	lch(24.93, 51.60, 293.17°)
OKLab	oklab(36.03% -0.0131 -0.1371)
OKLCH	oklch(36.03% 0.138 264.5)
XYZ	xyz(5.7898, 4.3936, 22.3682)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173584 #846617

analogous

#176C84 #173584 #2F1784

triadic

#173584 #841735 #358417

tetradic

#173584 #84176C #846617 #17842F

square

#173584 #84176C #846617 #17842F

split-complementary

#173584 #842F17 #6C8417

monochromatic

#050B1C #0E2050 #173584 #204AB8 #3966DC

Accessibility & contrast

On white

11.18

#173584 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173584 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173584

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173584	#FFFFFF	#000000	##FFFFFF
##173584	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004087

Deuteranopia (green-blind)

#003682

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173584;
/* rgb */ color: rgb(23, 53, 132);
/* oklch */ color: oklch(36.0% 0.138 264.5);

Tailwind

colors: {
  custom: {
    50: '#686ba8',
    500: '#173584',
    950: '#000000',
  },
}

SCSS

$custom: #173584;
$custom-light: #686ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#173584",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 132
  },
  "hsl": {
    "h": 223.486,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.3603,
    "c": 0.13769,
    "h": 264.5
  },
  "luminance": 0.04394
}

Semantic roles & 50–950 ramp

primary

#173584

secondary

#B8973F

accent

#BC3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #173584

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

Preview Lab → · Contrast checker → · Palette generator →