#173771#173771

#173771 is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.9% C 0.107 H 261.1°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#173771
RGB	rgb(23, 55, 113)
HSL	hsl(219, 66%, 27%)
HSV	hsv(219, 80%, 44%)
CMYK	cmyk(79.6%, 51.3%, 0%, 55.7%)
CIE-LAB	lab(24.02, 11.01, -36.90)
CIE-LCH	lch(24.02, 38.51, 286.62°)
OKLab	oklab(34.86% -0.0165 -0.106)
OKLCH	oklch(34.86% 0.107 261.1)
XYZ	xyz(4.6991, 4.1063, 16.1645)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173771 #715117

analogous

#176471 #173771 #241771

triadic

#173771 #711737 #377117

tetradic

#173771 #711764 #715117 #177124

square

#173771 #711764 #715117 #177124

split-complementary

#173771 #712417 #647117

monochromatic

#050C19 #0D1E3E #173771 #2150A4 #2E69D4

Accessibility & contrast

On white

11.53

#173771 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173771 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173771

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173771	#FFFFFF	#000000	##FFFFFF
##173771	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#153D73

Deuteranopia (green-blind)

#003570

Tritanopia (blue-blind)

#00454E

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173771;
/* rgb */ color: rgb(23, 55, 113);
/* oklch */ color: oklch(34.9% 0.107 261.1);

Tailwind

colors: {
  custom: {
    50: '#636d9a',
    500: '#173771',
    950: '#000000',
  },
}

SCSS

$custom: #173771;
$custom-light: #636d9a;
$custom-dark: #000000;

JSON

{
  "hex": "#173771",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 113
  },
  "hsl": {
    "h": 218.667,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34863,
    "c": 0.10733,
    "h": 261.1
  },
  "luminance": 0.04107
}

Semantic roles & 50–950 ramp

primary

#173771

secondary

#A7813D

accent

#AD3FE9

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173771

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

Preview Lab → · Contrast checker → · Palette generator →