#171C79#171C79

#171C79 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.2% C 0.153 H 270.6°. Best body text is #FFFFFF at 14.20:1 contrast (WCAG AA passes).

Color values

HEX	#171C79
RGB	rgb(23, 28, 121)
HSL	hsl(237, 68%, 28%)
HSV	hsv(237, 81%, 47%)
CMYK	cmyk(81%, 76.9%, 0%, 52.5%)
CIE-LAB	lab(17.43, 32.95, -52.79)
CIE-LCH	lch(17.43, 62.23, 301.97°)
OKLab	oklab(30.2% 0.0015 -0.1529)
OKLCH	oklch(30.2% 0.153 270.6)
XYZ	xyz(4.2186, 2.3927, 18.3249)
Luminance	0.0239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C79 #797417

analogous

#174D79 #171C79 #431779

triadic

#171C79 #79171C #1C7917

tetradic

#171C79 #79174D #797417 #177943

square

#171C79 #79174D #797417 #177943

split-complementary

#171C79 #794317 #4D7917

monochromatic

#05061A #0D1046 #171C79 #2128AC #323BD8

Accessibility & contrast

On white

14.20

#171C79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171C79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C79

14.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C79	#FFFFFF	#000000	##FFFFFF
##171C79	1.00	14.20	1.48	14.20
#FFFFFF	14.20	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307C

Deuteranopia (green-blind)

#002677

Tritanopia (blue-blind)

#003749

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171c79;
/* rgb */ color: rgb(23, 28, 121);
/* oklch */ color: oklch(30.2% 0.153 270.6);

Tailwind

colors: {
  custom: {
    50: '#6759a1',
    500: '#171c79',
    950: '#000000',
  },
}

SCSS

$custom: #171c79;
$custom-light: #6759a1;
$custom-dark: #000000;

JSON

{
  "hex": "#171c79",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 121
  },
  "hsl": {
    "h": 236.939,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.302,
    "c": 0.15289,
    "h": 270.6
  },
  "luminance": 0.02393
}

Semantic roles & 50–950 ramp

primary

#171C79

secondary

#AEA83E

accent

#E23DEB

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171C79

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

Preview Lab → · Contrast checker → · Palette generator →