#171888#171888

#171888 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.4% C 0.176 H 270.0°. Best body text is #FFFFFF at 13.79:1 contrast (WCAG AA passes).

Color values

HEX	#171888
RGB	rgb(23, 24, 136)
HSL	hsl(239, 71%, 31%)
HSV	hsv(239, 83%, 53%)
CMYK	cmyk(83.1%, 82.4%, 0%, 46.7%)
CIE-LAB	lab(18.42, 40.50, -60.66)
CIE-LCH	lch(18.42, 72.94, 303.73°)
OKLab	oklab(31.42% 0 -0.1757)
OKLCH	oklch(31.42% 0.176 270)
XYZ	xyz(5.1224, 2.6124, 23.5220)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171888 #888717

analogous

#175088 #171888 #4E1788

triadic

#171888 #881718 #188817

tetradic

#171888 #881750 #888717 #17884E

square

#171888 #881750 #888717 #17884E

split-complementary

#171888 #884E17 #508817

monochromatic

#05061F #0E0F54 #171888 #2021BC #3B3DDE

Accessibility & contrast

On white

13.79

#171888 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#171888 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171888

13.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171888	#FFFFFF	#000000	##FFFFFF
##171888	1.00	13.79	1.52	13.79
#FFFFFF	13.79	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338B

Deuteranopia (green-blind)

#002786

Tritanopia (blue-blind)

#003B50

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171888;
/* rgb */ color: rgb(23, 24, 136);
/* oklch */ color: oklch(31.4% 0.176 270.0);

Tailwind

colors: {
  custom: {
    50: '#6c58ac',
    500: '#171888',
    950: '#000000',
  },
}

SCSS

$custom: #171888;
$custom-light: #6c58ac;
$custom-dark: #000000;

JSON

{
  "hex": "#171888",
  "rgb": {
    "r": 23,
    "g": 24,
    "b": 136
  },
  "hsl": {
    "h": 239.469,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31424,
    "c": 0.17566,
    "h": 270
  },
  "luminance": 0.02613
}

Semantic roles & 50–950 ramp

primary

#171888

secondary

#BCBB3F

accent

#EC3AEE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #171888

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

Preview Lab → · Contrast checker → · Palette generator →