#171F3D#171F3D

#171F3D is a very dark, muted blue. Relative luminance 0.015; OKLCH L 24.9% C 0.058 H 270.5°. Best body text is #FFFFFF at 16.16:1 contrast (WCAG AA passes).

Color values

HEX	#171F3D
RGB	rgb(23, 31, 61)
HSL	hsl(227, 45%, 16%)
HSV	hsv(227, 62%, 24%)
CMYK	cmyk(62.3%, 49.2%, 0%, 76.1%)
CIE-LAB	lab(12.60, 7.10, -20.42)
CIE-LCH	lch(12.60, 21.62, 289.18°)
OKLab	oklab(24.91% 0.0005 -0.058)
OKLCH	oklch(24.91% 0.058 270.5)
XYZ	xyz(1.6854, 1.4989, 4.6145)
Luminance	0.0150 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F3D #3D3517

analogous

#17323D #171F3D #22173D

triadic

#171F3D #3D171F #1F3D17

tetradic

#171F3D #3D1732 #3D3517 #173D22

square

#171F3D #3D1732 #3D3517 #173D22

split-complementary

#171F3D #3D2217 #323D17

monochromatic

#080B16 #080B16 #171F3D #283669 #394C96

Accessibility & contrast

On white

16.16

#171F3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#171F3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F3D

16.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F3D	#FFFFFF	#000000	##FFFFFF
##171F3D	1.00	16.16	1.30	16.16
#FFFFFF	16.16	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12223E

Deuteranopia (green-blind)

#0E1F3C

Tritanopia (blue-blind)

#04262B

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171f3d;
/* rgb */ color: rgb(23, 31, 61);
/* oklch */ color: oklch(24.9% 0.058 270.5);

Tailwind

colors: {
  custom: {
    50: '#575a72',
    500: '#171f3d',
    950: '#000000',
  },
}

SCSS

$custom: #171f3d;
$custom-light: #575a72;
$custom-dark: #000000;

JSON

{
  "hex": "#171f3d",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 61
  },
  "hsl": {
    "h": 227.368,
    "s": 45.238,
    "l": 16.471
  },
  "oklch": {
    "l": 0.24914,
    "c": 0.058,
    "h": 270.5
  },
  "luminance": 0.01499
}

Semantic roles & 50–950 ramp

primary

#171F3D

secondary

#74683C

accent

#BA53D5

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #171F3D

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

Preview Lab → · Contrast checker → · Palette generator →