#171C53#171C53

#171C53 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.1% C 0.099 H 273.4°. Best body text is #FFFFFF at 15.82:1 contrast (WCAG AA passes).

Color values

HEX	#171C53
RGB	rgb(23, 28, 83)
HSL	hsl(235, 57%, 21%)
HSV	hsv(235, 72%, 33%)
CMYK	cmyk(72.3%, 66.3%, 0%, 67.5%)
CIE-LAB	lab(13.45, 18.28, -34.27)
CIE-LCH	lch(13.45, 38.84, 298.07°)
OKLab	oklab(26.12% 0.0059 -0.0988)
OKLCH	oklch(26.12% 0.099 273.4)
XYZ	xyz(2.3294, 1.6370, 8.3751)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C53 #534E17

analogous

#173A53 #171C53 #301753

triadic

#171C53 #53171C #1C5317

tetradic

#171C53 #53173A #534E17 #175330

square

#171C53 #53173A #534E17 #175330

split-complementary

#171C53 #533017 #3A5317

monochromatic

#070818 #0A0C23 #171C53 #242C83 #323CB3

Accessibility & contrast

On white

15.82

#171C53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#171C53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C53

15.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C53	#FFFFFF	#000000	##FFFFFF
##171C53	1.00	15.82	1.33	15.82
#FFFFFF	15.82	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002555

Deuteranopia (green-blind)

#002052

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171c53;
/* rgb */ color: rgb(23, 28, 83);
/* oklch */ color: oklch(26.1% 0.099 273.4);

Tailwind

colors: {
  custom: {
    50: '#5d5884',
    500: '#171c53',
    950: '#000000',
  },
}

SCSS

$custom: #171c53;
$custom-light: #5d5884;
$custom-dark: #000000;

JSON

{
  "hex": "#171c53",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 83
  },
  "hsl": {
    "h": 235,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.2612,
    "c": 0.09895,
    "h": 273.4
  },
  "luminance": 0.01637
}

Semantic roles & 50–950 ramp

primary

#171C53

secondary

#8A843C

accent

#D348E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171C53

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

Preview Lab → · Contrast checker → · Palette generator →