#173A84#173A84

#173A84 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.1% C 0.131 H 262.7°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#173A84
RGB	rgb(23, 58, 132)
HSL	hsl(221, 70%, 30%)
HSV	hsv(221, 83%, 52%)
CMYK	cmyk(82.6%, 56.1%, 0%, 48.2%)
CIE-LAB	lab(26.37, 16.78, -45.10)
CIE-LCH	lch(26.37, 48.12, 290.41°)
OKLab	oklab(37.11% -0.0166 -0.1301)
OKLCH	oklch(37.11% 0.131 262.7)
XYZ	xyz(6.0298, 4.8735, 22.4482)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A84 #846117

analogous

#177084 #173A84 #2A1784

triadic

#173A84 #84173A #3A8417

tetradic

#173A84 #841770 #846117 #17842A

square

#173A84 #841770 #846117 #17842A

split-complementary

#173A84 #842A17 #708417

monochromatic

#050C1C #0E2350 #173A84 #2051B8 #396DDC

Accessibility & contrast

On white

10.63

#173A84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#173A84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A84

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A84	#FFFFFF	#000000	##FFFFFF
##173A84	1.00	10.63	1.97	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004487

Deuteranopia (green-blind)

#003A83

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173a84;
/* rgb */ color: rgb(23, 58, 132);
/* oklch */ color: oklch(37.1% 0.131 262.7);

Tailwind

colors: {
  custom: {
    50: '#686fa8',
    500: '#173a84',
    950: '#000000',
  },
}

SCSS

$custom: #173a84;
$custom-light: #686fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#173a84",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 132
  },
  "hsl": {
    "h": 220.734,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37115,
    "c": 0.13116,
    "h": 262.7
  },
  "luminance": 0.04874
}

Semantic roles & 50–950 ramp

primary

#173A84

secondary

#B8913F

accent

#B43BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173A84

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

Preview Lab → · Contrast checker → · Palette generator →