#171F88#171F88

#171F88 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.169 H 269.3°. Best body text is #FFFFFF at 13.22:1 contrast (WCAG AA passes).

Color values

HEX	#171F88
RGB	rgb(23, 31, 136)
HSL	hsl(236, 71%, 31%)
HSV	hsv(236, 83%, 53%)
CMYK	cmyk(83.1%, 77.2%, 0%, 46.7%)
CIE-LAB	lab(19.80, 36.55, -58.38)
CIE-LCH	lch(19.80, 68.87, 302.05°)
OKLab	oklab(32.4% -0.0021 -0.1691)
OKLCH	oklch(32.4% 0.169 269.3)
XYZ	xyz(5.2857, 2.9391, 23.5765)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F88 #888017

analogous

#175788 #171F88 #471788

triadic

#171F88 #88171F #1F8817

tetradic

#171F88 #881757 #888017 #178847

square

#171F88 #881757 #888017 #178847

split-complementary

#171F88 #884717 #578817

monochromatic

#05071F #0E1354 #171F88 #202BBC #3B47DE

Accessibility & contrast

On white

13.22

#171F88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#171F88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F88

13.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F88	#FFFFFF	#000000	##FFFFFF
##171F88	1.00	13.22	1.59	13.22
#FFFFFF	13.22	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358B

Deuteranopia (green-blind)

#002A86

Tritanopia (blue-blind)

#003E52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171f88;
/* rgb */ color: rgb(23, 31, 136);
/* oklch */ color: oklch(32.4% 0.169 269.3);

Tailwind

colors: {
  custom: {
    50: '#6b5cac',
    500: '#171f88',
    950: '#000000',
  },
}

SCSS

$custom: #171f88;
$custom-light: #6b5cac;
$custom-dark: #000000;

JSON

{
  "hex": "#171f88",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 136
  },
  "hsl": {
    "h": 235.752,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.32395,
    "c": 0.16914,
    "h": 269.3
  },
  "luminance": 0.0294
}

Semantic roles & 50–950 ramp

primary

#171F88

secondary

#BCB33F

accent

#E13AEE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #171F88

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

Preview Lab → · Contrast checker → · Palette generator →