#173C82#173C82

#173C82 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.4% C 0.126 H 261.6°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#173C82
RGB	rgb(23, 60, 130)
HSL	hsl(219, 70%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(82.3%, 53.8%, 0%, 49%)
CIE-LAB	lab(26.81, 14.55, -43.14)
CIE-LCH	lch(26.81, 45.53, 288.63°)
OKLab	oklab(37.4% -0.0184 -0.1243)
OKLCH	oklch(37.4% 0.126 261.6)
XYZ	xyz(5.9970, 5.0249, 21.7686)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C82 #825D17

analogous

#177282 #173C82 #271782

triadic

#173C82 #82173C #3C8217

tetradic

#173C82 #821772 #825D17 #178227

square

#173C82 #821772 #825D17 #178227

split-complementary

#173C82 #822717 #728217

monochromatic

#050C1A #0E244E #173C82 #2054B6 #3870DC

Accessibility & contrast

On white

10.47

#173C82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#173C82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C82

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C82	#FFFFFF	#000000	##FFFFFF
##173C82	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A4584

Deuteranopia (green-blind)

#003B81

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173c82;
/* rgb */ color: rgb(23, 60, 130);
/* oklch */ color: oklch(37.4% 0.126 261.6);

Tailwind

colors: {
  custom: {
    50: '#6771a7',
    500: '#173c82',
    950: '#000000',
  },
}

SCSS

$custom: #173c82;
$custom-light: #6771a7;
$custom-dark: #000000;

JSON

{
  "hex": "#173c82",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 130
  },
  "hsl": {
    "h": 219.252,
    "s": 69.935,
    "l": 30
  },
  "oklch": {
    "l": 0.37395,
    "c": 0.12566,
    "h": 261.6
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#173C82

secondary

#B68D3E

accent

#AF3BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173C82

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

Preview Lab → · Contrast checker → · Palette generator →