#173C84#173C84

#173C84 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.129 H 261.9°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#173C84
RGB	rgb(23, 60, 132)
HSL	hsl(220, 70%, 30%)
HSV	hsv(220, 83%, 52%)
CMYK	cmyk(82.6%, 54.5%, 0%, 48.2%)
CIE-LAB	lab(26.96, 15.37, -44.14)
CIE-LCH	lch(26.96, 46.74, 289.20°)
OKLab	oklab(37.56% -0.0181 -0.1272)
OKLCH	oklch(37.56% 0.129 261.9)
XYZ	xyz(6.1326, 5.0791, 22.4825)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C84 #845F17

analogous

#177284 #173C84 #281784

triadic

#173C84 #84173C #3C8417

tetradic

#173C84 #841772 #845F17 #178428

square

#173C84 #841772 #845F17 #178428

split-complementary

#173C84 #842817 #728417

monochromatic

#050D1C #0E2450 #173C84 #2054B8 #3970DC

Accessibility & contrast

On white

10.42

#173C84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#173C84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C84

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C84	#FFFFFF	#000000	##FFFFFF
##173C84	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#054587

Deuteranopia (green-blind)

#003B83

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173c84;
/* rgb */ color: rgb(23, 60, 132);
/* oklch */ color: oklch(37.6% 0.129 261.9);

Tailwind

colors: {
  custom: {
    50: '#6871a8',
    500: '#173c84',
    950: '#000000',
  },
}

SCSS

$custom: #173c84;
$custom-light: #6871a8;
$custom-dark: #000000;

JSON

{
  "hex": "#173c84",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 132
  },
  "hsl": {
    "h": 219.633,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37561,
    "c": 0.12854,
    "h": 261.9
  },
  "luminance": 0.0508
}

Semantic roles & 50–950 ramp

primary

#173C84

secondary

#B88F3F

accent

#B13BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173C84

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

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