#173C85#173C85

#173C85 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.130 H 262.0°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#173C85
RGB	rgb(23, 60, 133)
HSL	hsl(220, 71%, 31%)
HSV	hsv(220, 83%, 52%)
CMYK	cmyk(82.7%, 54.9%, 0%, 47.8%)
CIE-LAB	lab(27.04, 15.79, -44.64)
CIE-LCH	lch(27.04, 47.35, 289.48°)
OKLab	oklab(37.64% -0.018 -0.1287)
OKLCH	oklch(37.64% 0.13 262)
XYZ	xyz(6.2013, 5.1066, 22.8446)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C85 #856017

analogous

#177385 #173C85 #291785

triadic

#173C85 #85173C #3C8517

tetradic

#173C85 #851773 #856017 #178529

square

#173C85 #851773 #856017 #178529

split-complementary

#173C85 #852917 #738517

monochromatic

#050D1D #0E2451 #173C85 #2054B9 #3A70DD

Accessibility & contrast

On white

10.39

#173C85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#173C85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C85

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C85	#FFFFFF	#000000	##FFFFFF
##173C85	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#034588

Deuteranopia (green-blind)

#003B84

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173c85;
/* rgb */ color: rgb(23, 60, 133);
/* oklch */ color: oklch(37.6% 0.130 262.0);

Tailwind

colors: {
  custom: {
    50: '#6871a9',
    500: '#173c85',
    950: '#000000',
  },
}

SCSS

$custom: #173c85;
$custom-light: #6871a9;
$custom-dark: #000000;

JSON

{
  "hex": "#173c85",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 133
  },
  "hsl": {
    "h": 219.818,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37644,
    "c": 0.12998,
    "h": 262
  },
  "luminance": 0.05107
}

Semantic roles & 50–950 ramp

primary

#173C85

secondary

#B9903F

accent

#B13BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173C85

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

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