#173F85#173F85

#173F85 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.126 H 260.7°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#173F85
RGB	rgb(23, 63, 133)
HSL	hsl(218, 71%, 31%)
HSV	hsv(218, 83%, 52%)
CMYK	cmyk(82.7%, 52.6%, 0%, 47.8%)
CIE-LAB	lab(27.93, 13.69, -43.20)
CIE-LCH	lch(27.93, 45.32, 287.58°)
OKLab	oklab(38.32% -0.0203 -0.1244)
OKLCH	oklch(38.32% 0.126 260.7)
XYZ	xyz(6.3630, 5.4299, 22.8985)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F85 #855D17

analogous

#177685 #173F85 #261785

triadic

#173F85 #85173F #3F8517

tetradic

#173F85 #851776 #855D17 #178526

square

#173F85 #851776 #855D17 #178526

split-complementary

#173F85 #852617 #768517

monochromatic

#050E1D #0E2651 #173F85 #2058B9 #3A75DD

Accessibility & contrast

On white

10.07

#173F85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#173F85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F85

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F85	#FFFFFF	#000000	##FFFFFF
##173F85	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#114788

Deuteranopia (green-blind)

#003D84

Tritanopia (blue-blind)

#00505B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #173f85;
/* rgb */ color: rgb(23, 63, 133);
/* oklch */ color: oklch(38.3% 0.126 260.7);

Tailwind

colors: {
  custom: {
    50: '#6873a9',
    500: '#173f85',
    950: '#000000',
  },
}

SCSS

$custom: #173f85;
$custom-light: #6873a9;
$custom-dark: #000000;

JSON

{
  "hex": "#173f85",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 133
  },
  "hsl": {
    "h": 218.182,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.38322,
    "c": 0.12607,
    "h": 260.7
  },
  "luminance": 0.05431
}

Semantic roles & 50–950 ramp

primary

#173F85

secondary

#B98D3F

accent

#AC3BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #173F85

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

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