#171C88#171C88

#171C88 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.0% C 0.172 H 269.6°. Best body text is #FFFFFF at 13.48:1 contrast (WCAG AA passes).

Color values

HEX	#171C88
RGB	rgb(23, 28, 136)
HSL	hsl(237, 71%, 31%)
HSV	hsv(237, 83%, 53%)
CMYK	cmyk(83.1%, 79.4%, 0%, 46.7%)
CIE-LAB	lab(19.18, 38.31, -59.40)
CIE-LCH	lch(19.18, 70.68, 302.82°)
OKLab	oklab(31.96% -0.0011 -0.1721)
OKLCH	oklch(31.96% 0.172 269.6)
XYZ	xyz(5.2110, 2.7896, 23.5516)
Luminance	0.0279 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C88 #888317

analogous

#175488 #171C88 #4A1788

triadic

#171C88 #88171C #1C8817

tetradic

#171C88 #881754 #888317 #17884A

square

#171C88 #881754 #888317 #17884A

split-complementary

#171C88 #884A17 #548817

monochromatic

#05061F #0E1154 #171C88 #2027BC #3B43DE

Accessibility & contrast

On white

13.48

#171C88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#171C88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C88

13.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C88	#FFFFFF	#000000	##FFFFFF
##171C88	1.00	13.48	1.56	13.48
#FFFFFF	13.48	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348B

Deuteranopia (green-blind)

#002986

Tritanopia (blue-blind)

#003D51

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #171c88;
/* rgb */ color: rgb(23, 28, 136);
/* oklch */ color: oklch(32.0% 0.172 269.6);

Tailwind

colors: {
  custom: {
    50: '#6c5aac',
    500: '#171c88',
    950: '#000000',
  },
}

SCSS

$custom: #171c88;
$custom-light: #6c5aac;
$custom-dark: #000000;

JSON

{
  "hex": "#171c88",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 136
  },
  "hsl": {
    "h": 237.345,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31958,
    "c": 0.17206,
    "h": 269.6
  },
  "luminance": 0.0279
}

Semantic roles & 50–950 ramp

primary

#171C88

secondary

#BCB63F

accent

#E63AEE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #171C88

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

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