#171C8D#171C8D

#171C8D is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.178 H 269.3°. Best body text is #FFFFFF at 13.23:1 contrast (WCAG AA passes).

Color values

HEX	#171C8D
RGB	rgb(23, 28, 141)
HSL	hsl(237, 72%, 32%)
HSV	hsv(237, 84%, 55%)
CMYK	cmyk(83.7%, 80.1%, 0%, 44.7%)
CIE-LAB	lab(19.78, 40.03, -61.53)
CIE-LCH	lch(19.78, 73.41, 303.05°)
OKLab	oklab(32.56% -0.002 -0.1782)
OKLCH	oklch(32.56% 0.178 269.3)
XYZ	xyz(5.5747, 2.9351, 25.4669)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C8D #8D8817

analogous

#17578D #171C8D #4D178D

triadic

#171C8D #8D171C #1C8D17

tetradic

#171C8D #8D1757 #8D8817 #178D4D

square

#171C8D #8D1757 #8D8817 #178D4D

split-complementary

#171C8D #8D4D17 #578D17

monochromatic

#060724 #0E1258 #171C8D #2026C2 #3F46E0

Accessibility & contrast

On white

13.23

#171C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#171C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C8D

13.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C8D	#FFFFFF	#000000	##FFFFFF
##171C8D	1.00	13.23	1.59	13.23
#FFFFFF	13.23	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003690

Deuteranopia (green-blind)

#002A8B

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171c8d;
/* rgb */ color: rgb(23, 28, 141);
/* oklch */ color: oklch(32.6% 0.178 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d5ab0',
    500: '#171c8d',
    950: '#000000',
  },
}

SCSS

$custom: #171c8d;
$custom-light: #6d5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#171c8d",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 141
  },
  "hsl": {
    "h": 237.458,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32556,
    "c": 0.17826,
    "h": 269.3
  },
  "luminance": 0.02936
}

Semantic roles & 50–950 ramp

primary

#171C8D

secondary

#C0BA40

accent

#E739EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080411

muted

#7B7980

Preview Lab

Preview with #171C8D

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

Preview Lab → · Contrast checker → · Palette generator →