#173871#173871

#173871 is a dark, moderate blue. Relative luminance 0.042; OKLCH L 35.1% C 0.106 H 260.5°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#173871
RGB	rgb(23, 56, 113)
HSL	hsl(218, 66%, 27%)
HSV	hsv(218, 80%, 44%)
CMYK	cmyk(79.6%, 50.4%, 0%, 55.7%)
CIE-LAB	lab(24.33, 10.30, -36.40)
CIE-LCH	lch(24.33, 37.83, 285.80°)
OKLab	oklab(35.1% -0.0174 -0.1046)
OKLCH	oklch(35.1% 0.106 260.5)
XYZ	xyz(4.7471, 4.2022, 16.1805)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173871 #715017

analogous

#176571 #173871 #231771

triadic

#173871 #711738 #387117

tetradic

#173871 #711765 #715017 #177123

square

#173871 #711765 #715017 #177123

split-complementary

#173871 #712317 #657117

monochromatic

#050D19 #0D1F3E #173871 #2151A4 #2E6BD4

Accessibility & contrast

On white

11.41

#173871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#173871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173871

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173871	#FFFFFF	#000000	##FFFFFF
##173871	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#183E73

Deuteranopia (green-blind)

#003670

Tritanopia (blue-blind)

#00464F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173871;
/* rgb */ color: rgb(23, 56, 113);
/* oklch */ color: oklch(35.1% 0.106 260.5);

Tailwind

colors: {
  custom: {
    50: '#636e9a',
    500: '#173871',
    950: '#000000',
  },
}

SCSS

$custom: #173871;
$custom-light: #636e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#173871",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 113
  },
  "hsl": {
    "h": 218,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.351,
    "c": 0.10601,
    "h": 260.5
  },
  "luminance": 0.04203
}

Semantic roles & 50–950 ramp

primary

#173871

secondary

#A7803D

accent

#AB3FE9

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173871

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

Preview Lab → · Contrast checker → · Palette generator →