#171D3D#171D3D

#171D3D is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.4% C 0.061 H 273.1°. Best body text is #FFFFFF at 16.41:1 contrast (WCAG AA passes).

Color values

HEX	#171D3D
RGB	rgb(23, 29, 61)
HSL	hsl(231, 45%, 16%)
HSV	hsv(231, 62%, 24%)
CMYK	cmyk(62.3%, 52.5%, 0%, 76.1%)
CIE-LAB	lab(11.94, 8.62, -21.47)
CIE-LCH	lch(11.94, 23.13, 291.88°)
OKLab	oklab(24.41% 0.0033 -0.0611)
OKLCH	oklch(24.41% 0.061 273.1)
XYZ	xyz(1.6347, 1.3977, 4.5976)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D3D #3D3717

analogous

#17303D #171D3D #24173D

triadic

#171D3D #3D171D #1D3D17

tetradic

#171D3D #3D1730 #3D3717 #173D24

square

#171D3D #3D1730 #3D3717 #173D24

split-complementary

#171D3D #3D2417 #303D17

monochromatic

#080B16 #080B16 #171D3D #283269 #394796

Accessibility & contrast

On white

16.41

#171D3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#171D3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D3D

16.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D3D	#FFFFFF	#000000	##FFFFFF
##171D3D	1.00	16.41	1.28	16.41
#FFFFFF	16.41	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F213E

Deuteranopia (green-blind)

#0A1E3C

Tritanopia (blue-blind)

#05242A

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #171d3d;
/* rgb */ color: rgb(23, 29, 61);
/* oklch */ color: oklch(24.4% 0.061 273.1);

Tailwind

colors: {
  custom: {
    50: '#585873',
    500: '#171d3d',
    950: '#000000',
  },
}

SCSS

$custom: #171d3d;
$custom-light: #585873;
$custom-dark: #000000;

JSON

{
  "hex": "#171d3d",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 61
  },
  "hsl": {
    "h": 230.526,
    "s": 45.238,
    "l": 16.471
  },
  "oklch": {
    "l": 0.24411,
    "c": 0.0612,
    "h": 273.1
  },
  "luminance": 0.01398
}

Semantic roles & 50–950 ramp

primary

#171D3D

secondary

#746B3C

accent

#C053D5

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #171D3D

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

Preview Lab → · Contrast checker → · Palette generator →