#173577#173577

#173577 is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.9% C 0.119 H 263.2°. Best body text is #FFFFFF at 11.59:1 contrast (WCAG AA passes).

Color values

HEX	#173577
RGB	rgb(23, 53, 119)
HSL	hsl(221, 68%, 28%)
HSV	hsv(221, 81%, 47%)
CMYK	cmyk(80.7%, 55.5%, 0%, 53.3%)
CIE-LAB	lab(23.87, 14.94, -40.97)
CIE-LCH	lch(23.87, 43.61, 290.03°)
OKLab	oklab(34.89% -0.0141 -0.1181)
OKLCH	oklch(34.89% 0.119 263.2)
XYZ	xyz(4.9550, 4.0597, 17.9716)
Luminance	0.0406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173577 #775917

analogous

#176577 #173577 #291777

triadic

#173577 #771735 #357717

tetradic

#173577 #771765 #775917 #177729

square

#173577 #771765 #775917 #177729

split-complementary

#173577 #772917 #657717

monochromatic

#050B1A #0D1E44 #173577 #214CAA #3165D7

Accessibility & contrast

On white

11.59

#173577 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#173577 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173577

11.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173577	#FFFFFF	#000000	##FFFFFF
##173577	1.00	11.59	1.81	11.59
#FFFFFF	11.59	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#033D79

Deuteranopia (green-blind)

#003576

Tritanopia (blue-blind)

#004550

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173577;
/* rgb */ color: rgb(23, 53, 119);
/* oklch */ color: oklch(34.9% 0.119 263.2);

Tailwind

colors: {
  custom: {
    50: '#646b9f',
    500: '#173577',
    950: '#000000',
  },
}

SCSS

$custom: #173577;
$custom-light: #646b9f;
$custom-dark: #000000;

JSON

{
  "hex": "#173577",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 119
  },
  "hsl": {
    "h": 221.25,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34892,
    "c": 0.1189,
    "h": 263.2
  },
  "luminance": 0.0406
}

Semantic roles & 50–950 ramp

primary

#173577

secondary

#AC8A3E

accent

#B43DEA

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #173577

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

Preview Lab → · Contrast checker → · Palette generator →