#173171#173171

#173171 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.5% C 0.115 H 264.3°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#173171
RGB	rgb(23, 49, 113)
HSL	hsl(223, 66%, 27%)
HSV	hsv(223, 80%, 44%)
CMYK	cmyk(79.6%, 56.6%, 0%, 55.7%)
CIE-LAB	lab(22.20, 15.31, -39.85)
CIE-LCH	lch(22.20, 42.69, 291.02°)
OKLab	oklab(33.48% -0.0114 -0.1148)
OKLCH	oklch(33.48% 0.115 264.3)
XYZ	xyz(4.4312, 3.5705, 16.0752)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173171 #715717

analogous

#175E71 #173171 #2A1771

triadic

#173171 #711731 #317117

tetradic

#173171 #71175E #715717 #17712A

square

#173171 #71175E #715717 #17712A

split-complementary

#173171 #712A17 #5E7117

monochromatic

#050B19 #0D1B3E #173171 #2147A4 #2E5ED4

Accessibility & contrast

On white

12.25

#173171 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#173171 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173171

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173171	#FFFFFF	#000000	##FFFFFF
##173171	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003973

Deuteranopia (green-blind)

#003170

Tritanopia (blue-blind)

#00414C

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #173171;
/* rgb */ color: rgb(23, 49, 113);
/* oklch */ color: oklch(33.5% 0.115 264.3);

Tailwind

colors: {
  custom: {
    50: '#63689a',
    500: '#173171',
    950: '#000000',
  },
}

SCSS

$custom: #173171;
$custom-light: #63689a;
$custom-dark: #000000;

JSON

{
  "hex": "#173171",
  "rgb": {
    "r": 23,
    "g": 49,
    "b": 113
  },
  "hsl": {
    "h": 222.667,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.33476,
    "c": 0.11539,
    "h": 264.3
  },
  "luminance": 0.03571
}

Semantic roles & 50–950 ramp

primary

#173171

secondary

#A7883D

accent

#B83FE9

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #173171

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

Preview Lab → · Contrast checker → · Palette generator →