#173788#173788

#173788 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.8% C 0.141 H 264.2°. Best body text is #FFFFFF at 10.83:1 contrast (WCAG AA passes).

Color values

HEX	#173788
RGB	rgb(23, 55, 136)
HSL	hsl(223, 71%, 31%)
HSV	hsv(223, 83%, 53%)
CMYK	cmyk(83.1%, 59.6%, 0%, 46.7%)
CIE-LAB	lab(25.84, 20.53, -48.46)
CIE-LCH	lch(25.84, 52.63, 292.96°)
OKLab	oklab(36.81% -0.0142 -0.14)
OKLCH	oklch(36.81% 0.141 264.2)
XYZ	xyz(6.1619, 4.6914, 23.8685)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173788 #886817

analogous

#176F88 #173788 #2F1788

triadic

#173788 #881737 #378817

tetradic

#173788 #88176F #886817 #17882F

square

#173788 #88176F #886817 #17882F

split-complementary

#173788 #882F17 #6F8817

monochromatic

#050D1F #0E2254 #173788 #204CBC #3B69DE

Accessibility & contrast

On white

10.83

#173788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#173788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173788

10.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173788	#FFFFFF	#000000	##FFFFFF
##173788	1.00	10.83	1.94	10.83
#FFFFFF	10.83	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438B

Deuteranopia (green-blind)

#003886

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173788;
/* rgb */ color: rgb(23, 55, 136);
/* oklch */ color: oklch(36.8% 0.141 264.2);

Tailwind

colors: {
  custom: {
    50: '#696dab',
    500: '#173788',
    950: '#000000',
  },
}

SCSS

$custom: #173788;
$custom-light: #696dab;
$custom-dark: #000000;

JSON

{
  "hex": "#173788",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 136
  },
  "hsl": {
    "h": 223.009,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.36814,
    "c": 0.14076,
    "h": 264.2
  },
  "luminance": 0.04692
}

Semantic roles & 50–950 ramp

primary

#173788

secondary

#BC983F

accent

#BB3AEE

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173788

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

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