#171579#171579

#171579 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.2% C 0.160 H 271.5°. Best body text is #FFFFFF at 14.79:1 contrast (WCAG AA passes).

Color values

HEX	#171579
RGB	rgb(23, 21, 121)
HSL	hsl(241, 70%, 28%)
HSV	hsv(241, 83%, 47%)
CMYK	cmyk(81%, 82.6%, 0%, 52.5%)
CIE-LAB	lab(16.00, 37.03, -55.16)
CIE-LCH	lch(16.00, 66.44, 303.88°)
OKLab	oklab(29.19% 0.0041 -0.1597)
OKLCH	oklch(29.19% 0.16 271.5)
XYZ	xyz(4.0715, 2.0985, 18.2759)
Luminance	0.0210 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171579 #777915

analogous

#154579 #171579 #491579

triadic

#171579 #791715 #157917

tetradic

#171579 #791545 #777915 #157949

square

#171579 #791545 #777915 #157949

split-complementary

#171579 #794915 #457915

monochromatic

#05051A #0D0C45 #171579 #211EAD #312EDB

Accessibility & contrast

On white

14.79

#171579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#171579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171579

14.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171579	#FFFFFF	#000000	##FFFFFF
##171579	1.00	14.79	1.42	14.79
#FFFFFF	14.79	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7C

Deuteranopia (green-blind)

#002377

Tritanopia (blue-blind)

#003447

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171579;
/* rgb */ color: rgb(23, 21, 121);
/* oklch */ color: oklch(29.2% 0.160 271.5);

Tailwind

colors: {
  custom: {
    50: '#6855a1',
    500: '#171579',
    950: '#000000',
  },
}

SCSS

$custom: #171579;
$custom-light: #6855a1;
$custom-dark: #000000;

JSON

{
  "hex": "#171579",
  "rgb": {
    "r": 23,
    "g": 21,
    "b": 121
  },
  "hsl": {
    "h": 241.2,
    "s": 70.423,
    "l": 27.843
  },
  "oklch": {
    "l": 0.29191,
    "c": 0.15972,
    "h": 271.5
  },
  "luminance": 0.02099
}

Semantic roles & 50–950 ramp

primary

#171579

secondary

#ACAF3B

accent

#ED3BEA

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171579

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

Preview Lab → · Contrast checker → · Palette generator →