#173D86#173D86

#173D86 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.0% C 0.130 H 261.8°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#173D86
RGB	rgb(23, 61, 134)
HSL	hsl(219, 71%, 31%)
HSV	hsv(219, 83%, 53%)
CMYK	cmyk(82.8%, 54.5%, 0%, 47.5%)
CIE-LAB	lab(27.41, 15.50, -44.66)
CIE-LCH	lch(27.41, 47.27, 289.14°)
OKLab	oklab(37.95% -0.0187 -0.1288)
OKLCH	oklch(37.95% 0.13 261.8)
XYZ	xyz(6.3236, 5.2401, 23.2278)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D86 #866017

analogous

#177486 #173D86 #281786

triadic

#173D86 #86173D #3D8617

tetradic

#173D86 #861774 #866017 #178628

square

#173D86 #861774 #866017 #178628

split-complementary

#173D86 #862817 #748617

monochromatic

#050D1E #0E2552 #173D86 #2055BA #3A72DD

Accessibility & contrast

On white

10.25

#173D86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#173D86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D86

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D86	#FFFFFF	#000000	##FFFFFF
##173D86	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#054689

Deuteranopia (green-blind)

#003C85

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173d86;
/* rgb */ color: rgb(23, 61, 134);
/* oklch */ color: oklch(38.0% 0.130 261.8);

Tailwind

colors: {
  custom: {
    50: '#6871aa',
    500: '#173d86',
    950: '#000000',
  },
}

SCSS

$custom: #173d86;
$custom-light: #6871aa;
$custom-dark: #000000;

JSON

{
  "hex": "#173d86",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 134
  },
  "hsl": {
    "h": 219.459,
    "s": 70.701,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37951,
    "c": 0.13011,
    "h": 261.8
  },
  "luminance": 0.05241
}

Semantic roles & 50–950 ramp

primary

#173D86

secondary

#BA903F

accent

#B03AED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173D86

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

Preview Lab → · Contrast checker → · Palette generator →