#171C41#171C41

#171C41 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.5% C 0.070 H 274.3°. Best body text is #FFFFFF at 16.42:1 contrast (WCAG AA passes).

Color values

HEX	#171C41
RGB	rgb(23, 28, 65)
HSL	hsl(233, 48%, 17%)
HSV	hsv(233, 65%, 25%)
CMYK	cmyk(64.6%, 56.9%, 0%, 74.5%)
CIE-LAB	lab(11.92, 10.99, -24.32)
CIE-LCH	lch(11.92, 26.69, 294.32°)
OKLab	oklab(24.49% 0.0052 -0.0695)
OKLCH	oklch(24.49% 0.07 274.3)
XYZ	xyz(1.7224, 1.3942, 5.1783)
Luminance	0.0139 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C41 #413C17

analogous

#173141 #171C41 #271741

triadic

#171C41 #41171C #1C4117

tetradic

#171C41 #411731 #413C17 #174127

square

#171C41 #411731 #413C17 #174127

split-complementary

#171C41 #412717 #314117

monochromatic

#080A17 #080A17 #171C41 #272F6E #37439B

Accessibility & contrast

On white

16.42

#171C41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#171C41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C41

16.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C41	#FFFFFF	#000000	##FFFFFF
##171C41	1.00	16.42	1.28	16.42
#FFFFFF	16.42	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#092142

Deuteranopia (green-blind)

#041E40

Tritanopia (blue-blind)

#01242B

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #171c41;
/* rgb */ color: rgb(23, 28, 65);
/* oklch */ color: oklch(24.5% 0.070 274.3);

Tailwind

colors: {
  custom: {
    50: '#595776',
    500: '#171c41',
    950: '#000000',
  },
}

SCSS

$custom: #171c41;
$custom-light: #595776;
$custom-dark: #000000;

JSON

{
  "hex": "#171c41",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 65
  },
  "hsl": {
    "h": 232.857,
    "s": 47.727,
    "l": 17.255
  },
  "oklch": {
    "l": 0.24489,
    "c": 0.06971,
    "h": 274.3
  },
  "luminance": 0.01394
}

Semantic roles & 50–950 ramp

primary

#171C41

secondary

#78713C

accent

#C750D7

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #171C41

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

Preview Lab → · Contrast checker → · Palette generator →