#173679#173679

#173679 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.3% C 0.120 H 263.0°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX#173679
RGBrgb(23, 54, 121)
HSLhsl(221, 68%, 28%)
HSVhsv(221, 81%, 47%)
CMYKcmyk(81%, 55.4%, 0%, 52.5%)
CIE-LABlab(24.32, 15.06, -41.50)
CIE-LCHlch(24.32, 44.15, 289.94°)
OKLaboklab(35.29% -0.0147 -0.1196)
OKLCHoklch(35.29% 0.121 263)
XYZxyz(5.1225, 4.2004, 18.6262)
Luminance0.0420 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#173679 #795A17
analogous
#176779 #173679 #291779
triadic
#173679 #791736 #367917
tetradic
#173679 #791767 #795A17 #177929
square
#173679 #791767 #795A17 #177929
split-complementary
#173679 #792917 #677917
monochromatic
#050B1A #0D1F46 #173679 #214DAC #3267D8

Accessibility & contrast

On white

11.41
#173679 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.84
#173679 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173679
11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##173679#FFFFFF#000000##FFFFFF
##1736791.0011.411.8411.41
#FFFFFF11.411.0021.001.00
#0000001.8421.001.0021.00
##FFFFFF11.411.0021.001.00

Color blindness preview

Protanopia (red-blind)
#033F7B
Deuteranopia (green-blind)
#003678
Tritanopia (blue-blind)
#004652
Achromatopsia (no color)
#3A3A3A

Design tokens & code

CSS
--color: #173679;
/* rgb */ color: rgb(23, 54, 121);
/* oklch */ color: oklch(35.3% 0.120 263.0);
Tailwind
colors: {
  custom: {
    50: '#656ca0',
    500: '#173679',
    950: '#000000',
  },
}
SCSS
$custom: #173679;
$custom-light: #656ca0;
$custom-dark: #000000;
JSON
{
  "hex": "#173679",
  "rgb": {
    "r": 23,
    "g": 54,
    "b": 121
  },
  "hsl": {
    "h": 221.02,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35287,
    "c": 0.1205,
    "h": 263
  },
  "luminance": 0.04201
}

Semantic roles & 50–950 ramp

primary
#173679
secondary
#AE8B3E
accent
#B43DEB
background
#F6F6F9
surface
#EBEBF2
border
#C6C6CC
text
#06060F
muted
#7A7A7E

Preview Lab

Preview with #173679

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

Preview Lab → · Contrast checker → · Palette generator →

#173679 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva