#173C72#173C72

#173C72 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.1% C 0.102 H 258.2°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#173C72
RGB	rgb(23, 60, 114)
HSL	hsl(216, 66%, 27%)
HSV	hsv(216, 80%, 45%)
CMYK	cmyk(79.8%, 47.4%, 0%, 55.3%)
CIE-LAB	lab(25.65, 7.90, -34.92)
CIE-LCH	lch(25.65, 35.80, 282.74°)
OKLab	oklab(36.14% -0.0209 -0.1001)
OKLCH	oklch(36.14% 0.102 258.2)
XYZ	xyz(5.0054, 4.6282, 16.5459)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C72 #724D17

analogous

#176A72 #173C72 #1F1772

triadic

#173C72 #72173C #3C7217

tetradic

#173C72 #72176A #724D17 #17721F

square

#173C72 #72176A #724D17 #17721F

split-complementary

#173C72 #721F17 #6A7217

monochromatic

#050D19 #0D213F #173C72 #2157A5 #2E72D5

Accessibility & contrast

On white

10.90

#173C72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#173C72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C72

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C72	#FFFFFF	#000000	##FFFFFF
##173C72	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204174

Deuteranopia (green-blind)

#0C3971

Tritanopia (blue-blind)

#004951

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173c72;
/* rgb */ color: rgb(23, 60, 114);
/* oklch */ color: oklch(36.1% 0.102 258.2);

Tailwind

colors: {
  custom: {
    50: '#63719b',
    500: '#173c72',
    950: '#000000',
  },
}

SCSS

$custom: #173c72;
$custom-light: #63719b;
$custom-dark: #000000;

JSON

{
  "hex": "#173c72",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 114
  },
  "hsl": {
    "h": 215.604,
    "s": 66.423,
    "l": 26.863
  },
  "oklch": {
    "l": 0.36138,
    "c": 0.10227,
    "h": 258.2
  },
  "luminance": 0.04629
}

Semantic roles & 50–950 ramp

primary

#173C72

secondary

#A87C3D

accent

#A43EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C72

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

Preview Lab → · Contrast checker → · Palette generator →