#173383#173383

#173383 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.5% C 0.139 H 265.1°. Best body text is #FFFFFF at 11.43:1 contrast (WCAG AA passes).

Color values

HEX#173383
RGBrgb(23, 51, 131)
HSLhsl(224, 70%, 30%)
HSVhsv(224, 82%, 51%)
CMYKcmyk(82.4%, 61.1%, 0%, 48.6%)
CIE-LABlab(24.28, 21.30, -47.87)
CIE-LCHlch(24.28, 52.40, 293.99°)
OKLaboklab(35.52% -0.0118 -0.1384)
OKLCHoklch(35.52% 0.139 265.1)
XYZxyz(5.6325, 4.1878, 21.9798)
Luminance0.0419 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#173383 #836717
analogous
#176983 #173383 #311783
triadic
#173383 #831733 #338317
tetradic
#173383 #831769 #836717 #178331
square
#173383 #831769 #836717 #178331
split-complementary
#173383 #833117 #698317
monochromatic
#050A1B #0E1F4F #173383 #2047B7 #3863DC

Accessibility & contrast

On white

11.43
#173383 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.84
#173383 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173383
11.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##173383#FFFFFF#000000##FFFFFF
##1733831.0011.431.8411.43
#FFFFFF11.431.0021.001.00
#0000001.8421.001.0021.00
##FFFFFF11.431.0021.001.00

Color blindness preview

Protanopia (red-blind)
#003F86
Deuteranopia (green-blind)
#003581
Tritanopia (blue-blind)
#004755
Achromatopsia (no color)
#3A3A3A

Design tokens & code

CSS
--color: #173383;
/* rgb */ color: rgb(23, 51, 131);
/* oklch */ color: oklch(35.5% 0.139 265.1);
Tailwind
colors: {
  custom: {
    50: '#686aa8',
    500: '#173383',
    950: '#000000',
  },
}
SCSS
$custom: #173383;
$custom-light: #686aa8;
$custom-dark: #000000;
JSON
{
  "hex": "#173383",
  "rgb": {
    "r": 23,
    "g": 51,
    "b": 131
  },
  "hsl": {
    "h": 224.444,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.35517,
    "c": 0.13887,
    "h": 265.1
  },
  "luminance": 0.04189
}

Semantic roles & 50–950 ramp

primary
#173383
secondary
#B7983F
accent
#BF3BED
background
#F6F6FA
surface
#ECEBF4
border
#C7C6CE
text
#070610
muted
#7A7A7F

Preview Lab

Preview with #173383

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

Preview Lab → · Contrast checker → · Palette generator →

#173383 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva