#173D85#173D85

#173D85 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.9% C 0.129 H 261.6°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#173D85
RGB	rgb(23, 61, 133)
HSL	hsl(219, 71%, 31%)
HSV	hsv(219, 83%, 52%)
CMYK	cmyk(82.7%, 54.1%, 0%, 47.8%)
CIE-LAB	lab(27.33, 15.09, -44.16)
CIE-LCH	lch(27.33, 46.67, 288.86°)
OKLab	oklab(37.87% -0.0188 -0.1273)
OKLCH	oklch(37.87% 0.129 261.6)
XYZ	xyz(6.2542, 5.2124, 22.8622)
Luminance	0.0521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D85 #855F17

analogous

#177485 #173D85 #281785

triadic

#173D85 #85173D #3D8517

tetradic

#173D85 #851774 #855F17 #178528

square

#173D85 #851774 #855F17 #178528

split-complementary

#173D85 #852817 #748517

monochromatic

#050D1D #0E2551 #173D85 #2055B9 #3A72DD

Accessibility & contrast

On white

10.28

#173D85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#173D85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D85

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D85	#FFFFFF	#000000	##FFFFFF
##173D85	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084688

Deuteranopia (green-blind)

#003C84

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173d85;
/* rgb */ color: rgb(23, 61, 133);
/* oklch */ color: oklch(37.9% 0.129 261.6);

Tailwind

colors: {
  custom: {
    50: '#6871a9',
    500: '#173d85',
    950: '#000000',
  },
}

SCSS

$custom: #173d85;
$custom-light: #6871a9;
$custom-dark: #000000;

JSON

{
  "hex": "#173d85",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 133
  },
  "hsl": {
    "h": 219.273,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37868,
    "c": 0.12867,
    "h": 261.6
  },
  "luminance": 0.05213
}

Semantic roles & 50–950 ramp

primary

#173D85

secondary

#B98F3F

accent

#B03BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173D85

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

Preview Lab → · Contrast checker → · Palette generator →