#173C86#173C86

#173C86 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.131 H 262.2°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#173C86
RGB	rgb(23, 60, 134)
HSL	hsl(220, 71%, 31%)
HSV	hsv(220, 83%, 53%)
CMYK	cmyk(82.8%, 55.2%, 0%, 47.5%)
CIE-LAB	lab(27.11, 16.20, -45.14)
CIE-LCH	lch(27.11, 47.96, 289.74°)
OKLab	oklab(37.73% -0.0179 -0.1302)
OKLCH	oklch(37.73% 0.131 262.2)
XYZ	xyz(6.2707, 5.1344, 23.2102)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C86 #866117

analogous

#177386 #173C86 #291786

triadic

#173C86 #86173C #3C8617

tetradic

#173C86 #861773 #866117 #178629

square

#173C86 #861773 #866117 #178629

split-complementary

#173C86 #862917 #738617

monochromatic

#050D1E #0E2552 #173C86 #2053BA #3A71DD

Accessibility & contrast

On white

10.36

#173C86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#173C86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C86

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C86	#FFFFFF	#000000	##FFFFFF
##173C86	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004589

Deuteranopia (green-blind)

#003B85

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173c86;
/* rgb */ color: rgb(23, 60, 134);
/* oklch */ color: oklch(37.7% 0.131 262.2);

Tailwind

colors: {
  custom: {
    50: '#6871aa',
    500: '#173c86',
    950: '#000000',
  },
}

SCSS

$custom: #173c86;
$custom-light: #6871aa;
$custom-dark: #000000;

JSON

{
  "hex": "#173c86",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 134
  },
  "hsl": {
    "h": 220,
    "s": 70.701,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37728,
    "c": 0.13141,
    "h": 262.2
  },
  "luminance": 0.05135
}

Semantic roles & 50–950 ramp

primary

#173C86

secondary

#BA913F

accent

#B23AED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173C86

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

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