#171D4D#171D4D

#171D4D is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.8% C 0.088 H 273.2°. Best body text is #FFFFFF at 15.92:1 contrast (WCAG AA passes).

Color values

HEX	#171D4D
RGB	rgb(23, 29, 77)
HSL	hsl(233, 54%, 20%)
HSV	hsv(233, 70%, 30%)
CMYK	cmyk(70.1%, 62.3%, 0%, 69.8%)
CIE-LAB	lab(13.21, 15.11, -30.57)
CIE-LCH	lch(13.21, 34.10, 296.29°)
OKLab	oklab(25.77% 0.0049 -0.0879)
OKLCH	oklch(25.77% 0.088 273.2)
XYZ	xyz(2.1318, 1.5965, 7.2156)
Luminance	0.0160 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.68

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D4D #4D4717

analogous

#17384D #171D4D #2C174D

triadic

#171D4D #4D171D #1D4D17

tetradic

#171D4D #4D1738 #4D4717 #174D2C

square

#171D4D #4D1738 #4D4717 #174D2C

split-complementary

#171D4D #4D2C17 #384D17

monochromatic

#070918 #090B1E #171D4D #252F7C #3340AB

Accessibility & contrast

On white

15.92

#171D4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#171D4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D4D

15.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D4D	#FFFFFF	#000000	##FFFFFF
##171D4D	1.00	15.92	1.32	15.92
#FFFFFF	15.92	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00244F

Deuteranopia (green-blind)

#00204C

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171d4d;
/* rgb */ color: rgb(23, 29, 77);
/* oklch */ color: oklch(25.8% 0.088 273.2);

Tailwind

colors: {
  custom: {
    50: '#5b587f',
    500: '#171d4d',
    950: '#000000',
  },
}

SCSS

$custom: #171d4d;
$custom-light: #5b587f;
$custom-dark: #000000;

JSON

{
  "hex": "#171d4d",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 77
  },
  "hsl": {
    "h": 233.333,
    "s": 54,
    "l": 19.608
  },
  "oklch": {
    "l": 0.2577,
    "c": 0.08803,
    "h": 273.2
  },
  "luminance": 0.01597
}

Semantic roles & 50–950 ramp

primary

#171D4D

secondary

#847C3C

accent

#CD4ADD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171D4D

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

Preview Lab → · Contrast checker → · Palette generator →