#171D4A#171D4A

#171D4A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.5% C 0.083 H 273.3°. Best body text is #FFFFFF at 16.02:1 contrast (WCAG AA passes).

Color values

HEX	#171D4A
RGB	rgb(23, 29, 74)
HSL	hsl(233, 53%, 19%)
HSV	hsv(233, 69%, 29%)
CMYK	cmyk(68.9%, 60.8%, 0%, 71%)
CIE-LAB	lab(12.95, 13.88, -28.92)
CIE-LCH	lch(12.95, 32.08, 295.64°)
OKLab	oklab(25.5% 0.0048 -0.083)
OKLCH	oklch(25.5% 0.083 273.3)
XYZ	xyz(2.0283, 1.5551, 6.6705)
Luminance	0.0155 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.61

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D4A #4A4417

analogous

#17374A #171D4A #2B174A

triadic

#171D4A #4A171D #1D4A17

tetradic

#171D4A #4A1737 #4A4417 #174A2B

square

#171D4A #4A1737 #4A4417 #174A2B

split-complementary

#171D4A #4A2B17 #374A17

monochromatic

#070917 #080B1B #171D4A #262F79 #3442A7

Accessibility & contrast

On white

16.02

#171D4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#171D4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D4A

16.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D4A	#FFFFFF	#000000	##FFFFFF
##171D4A	1.00	16.02	1.31	16.02
#FFFFFF	16.02	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01244C

Deuteranopia (green-blind)

#001F49

Tritanopia (blue-blind)

#002830

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171d4a;
/* rgb */ color: rgb(23, 29, 74);
/* oklch */ color: oklch(25.5% 0.083 273.3);

Tailwind

colors: {
  custom: {
    50: '#5b587d',
    500: '#171d4a',
    950: '#000000',
  },
}

SCSS

$custom: #171d4a;
$custom-light: #5b587d;
$custom-dark: #000000;

JSON

{
  "hex": "#171d4a",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 74
  },
  "hsl": {
    "h": 232.941,
    "s": 52.577,
    "l": 19.02
  },
  "oklch": {
    "l": 0.25499,
    "c": 0.08317,
    "h": 273.3
  },
  "luminance": 0.01555
}

Semantic roles & 50–950 ramp

primary

#171D4A

secondary

#81793C

accent

#CB4CDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #171D4A

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

Preview Lab → · Contrast checker → · Palette generator →