#173C83#173C83

#173C83 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.5% C 0.127 H 261.7°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#173C83
RGB	rgb(23, 60, 131)
HSL	hsl(219, 70%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(82.4%, 54.2%, 0%, 48.6%)
CIE-LAB	lab(26.88, 14.96, -43.64)
CIE-LCH	lch(26.88, 46.14, 288.92°)
OKLab	oklab(37.48% -0.0182 -0.1258)
OKLCH	oklch(37.48% 0.127 261.7)
XYZ	xyz(6.0645, 5.0518, 22.1238)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C83 #835E17

analogous

#177283 #173C83 #281783

triadic

#173C83 #83173C #3C8317

tetradic

#173C83 #831772 #835E17 #178328

square

#173C83 #831772 #835E17 #178328

split-complementary

#173C83 #832817 #728317

monochromatic

#050C1B #0E244F #173C83 #2054B7 #3870DC

Accessibility & contrast

On white

10.44

#173C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#173C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C83

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C83	#FFFFFF	#000000	##FFFFFF
##173C83	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084586

Deuteranopia (green-blind)

#003B82

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173c83;
/* rgb */ color: rgb(23, 60, 131);
/* oklch */ color: oklch(37.5% 0.127 261.7);

Tailwind

colors: {
  custom: {
    50: '#6771a8',
    500: '#173c83',
    950: '#000000',
  },
}

SCSS

$custom: #173c83;
$custom-light: #6771a8;
$custom-dark: #000000;

JSON

{
  "hex": "#173c83",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 131
  },
  "hsl": {
    "h": 219.444,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37478,
    "c": 0.12711,
    "h": 261.7
  },
  "luminance": 0.05053
}

Semantic roles & 50–950 ramp

primary

#173C83

secondary

#B78E3F

accent

#B03BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173C83

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

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