#173579#173579

#173579 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.1% C 0.122 H 263.5°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#173579
RGB	rgb(23, 53, 121)
HSL	hsl(222, 68%, 28%)
HSV	hsv(222, 81%, 47%)
CMYK	cmyk(81%, 56.2%, 0%, 52.5%)
CIE-LAB	lab(24.03, 15.77, -41.98)
CIE-LCH	lch(24.03, 44.85, 290.59°)
OKLab	oklab(35.06% -0.0139 -0.121)
OKLCH	oklch(35.06% 0.122 263.5)
XYZ	xyz(5.0764, 4.1083, 18.6109)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173579 #795B17

analogous

#176679 #173579 #2A1779

triadic

#173579 #791735 #357917

tetradic

#173579 #791766 #795B17 #17792A

square

#173579 #791766 #795B17 #17792A

split-complementary

#173579 #792A17 #667917

monochromatic

#050B1A #0D1E46 #173579 #214CAC #3265D8

Accessibility & contrast

On white

11.53

#173579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173579

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173579	#FFFFFF	#000000	##FFFFFF
##173579	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7B

Deuteranopia (green-blind)

#003578

Tritanopia (blue-blind)

#004651

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173579;
/* rgb */ color: rgb(23, 53, 121);
/* oklch */ color: oklch(35.1% 0.122 263.5);

Tailwind

colors: {
  custom: {
    50: '#656ba0',
    500: '#173579',
    950: '#000000',
  },
}

SCSS

$custom: #173579;
$custom-light: #656ba0;
$custom-dark: #000000;

JSON

{
  "hex": "#173579",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 121
  },
  "hsl": {
    "h": 221.633,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35062,
    "c": 0.12183,
    "h": 263.5
  },
  "luminance": 0.04109
}

Semantic roles & 50–950 ramp

primary

#173579

secondary

#AE8C3E

accent

#B63DEB

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060F

muted

#7A7A7E

Preview Lab

Preview with #173579

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

Preview Lab → · Contrast checker → · Palette generator →