#171789#171789

#171789 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.4% C 0.178 H 270.0°. Best body text is #FFFFFF at 13.81:1 contrast (WCAG AA passes).

Color values

HEX	#171789
RGB	rgb(23, 23, 137)
HSL	hsl(240, 71%, 31%)
HSV	hsv(240, 83%, 54%)
CMYK	cmyk(83.2%, 83.2%, 0%, 46.3%)
CIE-LAB	lab(18.37, 41.36, -61.38)
CIE-LCH	lch(18.37, 74.01, 303.97°)
OKLab	oklab(31.42% 0 -0.1777)
OKLCH	oklch(31.42% 0.178 270)
XYZ	xyz(5.1736, 2.6005, 23.8913)
Luminance	0.0260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171789 #898917

analogous

#175089 #171789 #501789

triadic

#171789 #891717 #178917

tetradic

#171789 #891750 #898917 #178950

square

#171789 #891750 #898917 #178950

split-complementary

#171789 #895017 #508917

monochromatic

#050520 #0E0E55 #171789 #2020BD #3C3CDE

Accessibility & contrast

On white

13.81

#171789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#171789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171789

13.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171789	#FFFFFF	#000000	##FFFFFF
##171789	1.00	13.81	1.52	13.81
#FFFFFF	13.81	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338C

Deuteranopia (green-blind)

#002787

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171789;
/* rgb */ color: rgb(23, 23, 137);
/* oklch */ color: oklch(31.4% 0.178 270.0);

Tailwind

colors: {
  custom: {
    50: '#6c57ad',
    500: '#171789',
    950: '#000000',
  },
}

SCSS

$custom: #171789;
$custom-light: #6c57ad;
$custom-dark: #000000;

JSON

{
  "hex": "#171789",
  "rgb": {
    "r": 23,
    "g": 23,
    "b": 137
  },
  "hsl": {
    "h": 240,
    "s": 71.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31424,
    "c": 0.17771,
    "h": 270
  },
  "luminance": 0.02601
}

Semantic roles & 50–950 ramp

primary

#171789

secondary

#BDBD3F

accent

#EE3AEE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #171789

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

Preview Lab → · Contrast checker → · Palette generator →