#173566#173566

#173566 is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.5% C 0.093 H 259.8°. Best body text is #FFFFFF at 12.09:1 contrast (WCAG AA passes).

Color values

HEX	#173566
RGB	rgb(23, 53, 102)
HSL	hsl(217, 63%, 25%)
HSV	hsv(217, 77%, 40%)
CMYK	cmyk(77.5%, 48%, 0%, 60%)
CIE-LAB	lab(22.61, 7.84, -32.08)
CIE-LCH	lch(22.61, 33.03, 283.74°)
OKLab	oklab(33.53% -0.0166 -0.0919)
OKLCH	oklch(33.53% 0.093 259.8)
XYZ	xyz(4.0239, 3.6872, 13.0674)
Luminance	0.0369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173566 #664817

analogous

#175D66 #173566 #211766

triadic

#173566 #661735 #356617

tetradic

#173566 #66175D #664817 #176621

square

#173566 #66175D #664817 #176621

split-complementary

#173566 #662117 #5D6617

monochromatic

#060D19 #0C1B34 #173566 #224F98 #2E69CA

Accessibility & contrast

On white

12.09

#173566 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#173566 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173566

12.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173566	#FFFFFF	#000000	##FFFFFF
##173566	1.00	12.09	1.74	12.09
#FFFFFF	12.09	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C3A68

Deuteranopia (green-blind)

#0B3365

Tritanopia (blue-blind)

#004148

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #173566;
/* rgb */ color: rgb(23, 53, 102);
/* oklch */ color: oklch(33.5% 0.093 259.8);

Tailwind

colors: {
  custom: {
    50: '#606b92',
    500: '#173566',
    950: '#000000',
  },
}

SCSS

$custom: #173566;
$custom-light: #606b92;
$custom-dark: #000000;

JSON

{
  "hex": "#173566",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 102
  },
  "hsl": {
    "h": 217.215,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.33528,
    "c": 0.09341,
    "h": 259.8
  },
  "luminance": 0.03688
}

Semantic roles & 50–950 ramp

primary

#173566

secondary

#9C783C

accent

#A842E6

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#05060D

muted

#7A7A7E

Preview Lab

Preview with #173566

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

Preview Lab → · Contrast checker → · Palette generator →