#171F8D#171F8D

#171F8D is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.0% C 0.175 H 269.1°. Best body text is #FFFFFF at 12.99:1 contrast (WCAG AA passes).

Color values

HEX	#171F8D
RGB	rgb(23, 31, 141)
HSL	hsl(236, 72%, 32%)
HSV	hsv(236, 84%, 55%)
CMYK	cmyk(83.7%, 78%, 0%, 44.7%)
CIE-LAB	lab(20.38, 38.32, -60.54)
CIE-LCH	lch(20.38, 71.65, 302.33°)
OKLab	oklab(32.98% -0.0029 -0.1754)
OKLCH	oklch(32.98% 0.175 269.1)
XYZ	xyz(5.6494, 3.0845, 25.4918)
Luminance	0.0308 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F8D #8D8517

analogous

#175A8D #171F8D #4A178D

triadic

#171F8D #8D171F #1F8D17

tetradic

#171F8D #8D175A #8D8517 #178D4A

square

#171F8D #8D175A #8D8517 #178D4A

split-complementary

#171F8D #8D4A17 #5A8D17

monochromatic

#060824 #0E1358 #171F8D #202BC2 #3F4AE0

Accessibility & contrast

On white

12.99

#171F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#171F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F8D

12.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F8D	#FFFFFF	#000000	##FFFFFF
##171F8D	1.00	12.99	1.62	12.99
#FFFFFF	12.99	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003790

Deuteranopia (green-blind)

#002B8B

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #171f8d;
/* rgb */ color: rgb(23, 31, 141);
/* oklch */ color: oklch(33.0% 0.175 269.1);

Tailwind

colors: {
  custom: {
    50: '#6d5cb0',
    500: '#171f8d',
    950: '#000000',
  },
}

SCSS

$custom: #171f8d;
$custom-light: #6d5cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#171f8d",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 141
  },
  "hsl": {
    "h": 235.932,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32977,
    "c": 0.17544,
    "h": 269.1
  },
  "luminance": 0.03085
}

Semantic roles & 50–950 ramp

primary

#171F8D

secondary

#C0B740

accent

#E239EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080411

muted

#7B7980

Preview Lab

Preview with #171F8D

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

Preview Lab → · Contrast checker → · Palette generator →