#171B41#171B41

#171B41 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.3% C 0.071 H 275.2°. Best body text is #FFFFFF at 16.54:1 contrast (WCAG AA passes).

Color values

HEX	#171B41
RGB	rgb(23, 27, 65)
HSL	hsl(234, 48%, 17%)
HSV	hsv(234, 65%, 25%)
CMYK	cmyk(64.6%, 58.5%, 0%, 74.5%)
CIE-LAB	lab(11.60, 11.75, -24.83)
CIE-LCH	lch(11.60, 27.47, 295.33°)
OKLab	oklab(24.25% 0.0065 -0.071)
OKLCH	oklch(24.25% 0.071 275.2)
XYZ	xyz(1.6991, 1.3476, 5.1706)
Luminance	0.0135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B41 #413D17

analogous

#173041 #171B41 #281741

triadic

#171B41 #41171B #1B4117

tetradic

#171B41 #411730 #413D17 #174128

square

#171B41 #411730 #413D17 #174128

split-complementary

#171B41 #412817 #304117

monochromatic

#080917 #080917 #171B41 #272E6E #37419B

Accessibility & contrast

On white

16.54

#171B41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#171B41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B41

16.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B41	#FFFFFF	#000000	##FFFFFF
##171B41	1.00	16.54	1.27	16.54
#FFFFFF	16.54	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#072142

Deuteranopia (green-blind)

#021D40

Tritanopia (blue-blind)

#02242B

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #171b41;
/* rgb */ color: rgb(23, 27, 65);
/* oklch */ color: oklch(24.3% 0.071 275.2);

Tailwind

colors: {
  custom: {
    50: '#595776',
    500: '#171b41',
    950: '#000000',
  },
}

SCSS

$custom: #171b41;
$custom-light: #595776;
$custom-dark: #000000;

JSON

{
  "hex": "#171b41",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 65
  },
  "hsl": {
    "h": 234.286,
    "s": 47.727,
    "l": 17.255
  },
  "oklch": {
    "l": 0.24252,
    "c": 0.07132,
    "h": 275.2
  },
  "luminance": 0.01348
}

Semantic roles & 50–950 ramp

primary

#171B41

secondary

#78723C

accent

#CA50D7

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #171B41

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

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