#173685#173685

#173685 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.3% C 0.138 H 264.3°. Best body text is #FFFFFF at 11.04:1 contrast (WCAG AA passes).

Color values

HEX	#173685
RGB	rgb(23, 54, 133)
HSL	hsl(223, 71%, 31%)
HSV	hsv(223, 83%, 52%)
CMYK	cmyk(82.7%, 59.4%, 0%, 47.8%)
CIE-LAB	lab(25.30, 20.01, -47.46)
CIE-LCH	lch(25.30, 51.51, 292.86°)
OKLab	oklab(36.33% -0.0137 -0.1371)
OKLCH	oklch(36.33% 0.138 264.3)
XYZ	xyz(5.9046, 4.5132, 22.7457)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173685 #856617

analogous

#176D85 #173685 #2F1785

triadic

#173685 #851736 #368517

tetradic

#173685 #85176D #856617 #17852F

square

#173685 #85176D #856617 #17852F

split-complementary

#173685 #852F17 #6D8517

monochromatic

#050C1D #0E2151 #173685 #204BB9 #3A68DD

Accessibility & contrast

On white

11.04

#173685 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#173685 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173685

11.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173685	#FFFFFF	#000000	##FFFFFF
##173685	1.00	11.04	1.90	11.04
#FFFFFF	11.04	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004188

Deuteranopia (green-blind)

#003783

Tritanopia (blue-blind)

#004A58

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173685;
/* rgb */ color: rgb(23, 54, 133);
/* oklch */ color: oklch(36.3% 0.138 264.3);

Tailwind

colors: {
  custom: {
    50: '#686ca9',
    500: '#173685',
    950: '#000000',
  },
}

SCSS

$custom: #173685;
$custom-light: #686ca9;
$custom-dark: #000000;

JSON

{
  "hex": "#173685",
  "rgb": {
    "r": 23,
    "g": 54,
    "b": 133
  },
  "hsl": {
    "h": 223.091,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36333,
    "c": 0.13781,
    "h": 264.3
  },
  "luminance": 0.04514
}

Semantic roles & 50–950 ramp

primary

#173685

secondary

#B9973F

accent

#BB3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173685

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

Preview Lab → · Contrast checker → · Palette generator →