#173C73#173C73

#173C73 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.2% C 0.104 H 258.5°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#173C73
RGB	rgb(23, 60, 115)
HSL	hsl(216, 67%, 27%)
HSV	hsv(216, 80%, 45%)
CMYK	cmyk(80%, 47.8%, 0%, 54.9%)
CIE-LAB	lab(25.72, 8.31, -35.45)
CIE-LCH	lch(25.72, 36.41, 283.20°)
OKLab	oklab(36.21% -0.0207 -0.1017)
OKLCH	oklch(36.21% 0.104 258.5)
XYZ	xyz(5.0626, 4.6511, 16.8473)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C73 #734E17

analogous

#176A73 #173C73 #201773

triadic

#173C73 #73173C #3C7317

tetradic

#173C73 #73176A #734E17 #177320

square

#173C73 #73176A #734E17 #177320

split-complementary

#173C73 #732017 #6A7317

monochromatic

#050D1A #0D2140 #173C73 #2157A6 #2F72D5

Accessibility & contrast

On white

10.88

#173C73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#173C73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C73

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C73	#FFFFFF	#000000	##FFFFFF
##173C73	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4175

Deuteranopia (green-blind)

#0A3972

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173c73;
/* rgb */ color: rgb(23, 60, 115);
/* oklch */ color: oklch(36.2% 0.104 258.5);

Tailwind

colors: {
  custom: {
    50: '#63719c',
    500: '#173c73',
    950: '#000000',
  },
}

SCSS

$custom: #173c73;
$custom-light: #63719c;
$custom-dark: #000000;

JSON

{
  "hex": "#173c73",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 115
  },
  "hsl": {
    "h": 215.87,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.36213,
    "c": 0.10375,
    "h": 258.5
  },
  "luminance": 0.04652
}

Semantic roles & 50–950 ramp

primary

#173C73

secondary

#A97D3D

accent

#A53EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C73

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

Preview Lab → · Contrast checker → · Palette generator →