#173985#173985

#173985 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.0% C 0.134 H 263.2°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#173985
RGB	rgb(23, 57, 133)
HSL	hsl(221, 71%, 31%)
HSV	hsv(221, 83%, 52%)
CMYK	cmyk(82.7%, 57.1%, 0%, 47.8%)
CIE-LAB	lab(26.16, 17.90, -46.06)
CIE-LCH	lch(26.16, 49.42, 291.23°)
OKLab	oklab(36.98% -0.0158 -0.133)
OKLCH	oklch(36.98% 0.134 263.2)
XYZ	xyz(6.0486, 4.8011, 22.7937)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173985 #856317

analogous

#177085 #173985 #2C1785

triadic

#173985 #851739 #398517

tetradic

#173985 #851770 #856317 #17852C

square

#173985 #851770 #856317 #17852C

split-complementary

#173985 #852C17 #708517

monochromatic

#050C1D #0E2351 #173985 #204FB9 #3A6CDD

Accessibility & contrast

On white

10.71

#173985 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173985 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173985

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173985	#FFFFFF	#000000	##FFFFFF
##173985	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004388

Deuteranopia (green-blind)

#003984

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173985;
/* rgb */ color: rgb(23, 57, 133);
/* oklch */ color: oklch(37.0% 0.134 263.2);

Tailwind

colors: {
  custom: {
    50: '#686ea9',
    500: '#173985',
    950: '#000000',
  },
}

SCSS

$custom: #173985;
$custom-light: #686ea9;
$custom-dark: #000000;

JSON

{
  "hex": "#173985",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 133
  },
  "hsl": {
    "h": 221.455,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3698,
    "c": 0.1339,
    "h": 263.2
  },
  "luminance": 0.04802
}

Semantic roles & 50–950 ramp

primary

#173985

secondary

#B9933F

accent

#B63BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173985

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

Preview Lab → · Contrast checker → · Palette generator →