#171D3F#171D3F

#171D3F is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.065 H 273.2°. Best body text is #FFFFFF at 16.36:1 contrast (WCAG AA passes).

Color values

HEX	#171D3F
RGB	rgb(23, 29, 63)
HSL	hsl(231, 47%, 17%)
HSV	hsv(231, 63%, 25%)
CMYK	cmyk(63.5%, 54%, 0%, 75.3%)
CIE-LAB	lab(12.09, 9.43, -22.65)
CIE-LCH	lch(12.09, 24.53, 292.60°)
OKLab	oklab(24.57% 0.0036 -0.0646)
OKLCH	oklch(24.57% 0.065 273.2)
XYZ	xyz(1.6896, 1.4196, 4.8866)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D3F #3F3917

analogous

#17313F #171D3F #25173F

triadic

#171D3F #3F171D #1D3F17

tetradic

#171D3F #3F1731 #3F3917 #173F25

square

#171D3F #3F1731 #3F3917 #173F25

split-complementary

#171D3F #3F2517 #313F17

monochromatic

#080A16 #080A16 #171D3F #27326C #384699

Accessibility & contrast

On white

16.36

#171D3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#171D3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D3F

16.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D3F	#FFFFFF	#000000	##FFFFFF
##171D3F	1.00	16.36	1.28	16.36
#FFFFFF	16.36	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D2140

Deuteranopia (green-blind)

#081E3E

Tritanopia (blue-blind)

#03252A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #171d3f;
/* rgb */ color: rgb(23, 29, 63);
/* oklch */ color: oklch(24.6% 0.065 273.2);

Tailwind

colors: {
  custom: {
    50: '#585874',
    500: '#171d3f',
    950: '#000000',
  },
}

SCSS

$custom: #171d3f;
$custom-light: #585874;
$custom-dark: #000000;

JSON

{
  "hex": "#171d3f",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 63
  },
  "hsl": {
    "h": 231,
    "s": 46.512,
    "l": 16.863
  },
  "oklch": {
    "l": 0.24568,
    "c": 0.06467,
    "h": 273.2
  },
  "luminance": 0.0142
}

Semantic roles & 50–950 ramp

primary

#171D3F

secondary

#766D3C

accent

#C252D6

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #171D3F

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

Preview Lab → · Contrast checker → · Palette generator →