#171C4D#171C4D

#171C4D is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.5% C 0.090 H 273.8°. Best body text is #FFFFFF at 16.04:1 contrast (WCAG AA passes).

Color values

HEX	#171C4D
RGB	rgb(23, 28, 77)
HSL	hsl(234, 54%, 20%)
HSV	hsv(234, 70%, 30%)
CMYK	cmyk(70.1%, 63.6%, 0%, 69.8%)
CIE-LAB	lab(12.91, 15.85, -31.06)
CIE-LCH	lch(12.91, 34.87, 297.04°)
OKLab	oklab(25.55% 0.006 -0.0893)
OKLCH	oklch(25.55% 0.09 273.8)
XYZ	xyz(2.1077, 1.5483, 7.2075)
Luminance	0.0155 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C4D #4D4817

analogous

#17374D #171C4D #2D174D

triadic

#171C4D #4D171C #1C4D17

tetradic

#171C4D #4D1737 #4D4817 #174D2D

square

#171C4D #4D1737 #4D4817 #174D2D

split-complementary

#171C4D #4D2D17 #374D17

monochromatic

#070918 #090B1E #171C4D #252D7C #333EAB

Accessibility & contrast

On white

16.04

#171C4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#171C4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C4D

16.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C4D	#FFFFFF	#000000	##FFFFFF
##171C4D	1.00	16.04	1.31	16.04
#FFFFFF	16.04	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00244F

Deuteranopia (green-blind)

#001F4C

Tritanopia (blue-blind)

#002831

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171c4d;
/* rgb */ color: rgb(23, 28, 77);
/* oklch */ color: oklch(25.5% 0.090 273.8);

Tailwind

colors: {
  custom: {
    50: '#5b587f',
    500: '#171c4d',
    950: '#000000',
  },
}

SCSS

$custom: #171c4d;
$custom-light: #5b587f;
$custom-dark: #000000;

JSON

{
  "hex": "#171c4d",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 77
  },
  "hsl": {
    "h": 234.444,
    "s": 54,
    "l": 19.608
  },
  "oklch": {
    "l": 0.25549,
    "c": 0.08952,
    "h": 273.8
  },
  "luminance": 0.01548
}

Semantic roles & 50–950 ramp

primary

#171C4D

secondary

#847D3C

accent

#D04ADD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171C4D

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

Preview Lab → · Contrast checker → · Palette generator →