#171B4D#171B4D

#171B4D is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.3% C 0.091 H 274.4°. Best body text is #FFFFFF at 16.15:1 contrast (WCAG AA passes).

Color values

HEX	#171B4D
RGB	rgb(23, 27, 77)
HSL	hsl(236, 54%, 20%)
HSV	hsv(236, 70%, 30%)
CMYK	cmyk(70.1%, 64.9%, 0%, 69.8%)
CIE-LAB	lab(12.62, 16.60, -31.53)
CIE-LCH	lch(12.62, 35.63, 297.76°)
OKLab	oklab(25.33% 0.007 -0.0907)
OKLCH	oklch(25.33% 0.091 274.4)
XYZ	xyz(2.0844, 1.5017, 7.1997)
Luminance	0.0150 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B4D #4D4917

analogous

#17364D #171B4D #2E174D

triadic

#171B4D #4D171B #1B4D17

tetradic

#171B4D #4D1736 #4D4917 #174D2E

square

#171B4D #4D1736 #4D4917 #174D2E

split-complementary

#171B4D #4D2E17 #364D17

monochromatic

#070818 #090A1E #171B4D #252C7C #333CAB

Accessibility & contrast

On white

16.15

#171B4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#171B4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B4D

16.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B4D	#FFFFFF	#000000	##FFFFFF
##171B4D	1.00	16.15	1.30	16.15
#FFFFFF	16.15	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234F

Deuteranopia (green-blind)

#001E4C

Tritanopia (blue-blind)

#002731

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171b4d;
/* rgb */ color: rgb(23, 27, 77);
/* oklch */ color: oklch(25.3% 0.091 274.4);

Tailwind

colors: {
  custom: {
    50: '#5b577f',
    500: '#171b4d',
    950: '#000000',
  },
}

SCSS

$custom: #171b4d;
$custom-light: #5b577f;
$custom-dark: #000000;

JSON

{
  "hex": "#171b4d",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 77
  },
  "hsl": {
    "h": 235.556,
    "s": 54,
    "l": 19.608
  },
  "oklch": {
    "l": 0.25331,
    "c": 0.091,
    "h": 274.4
  },
  "luminance": 0.01502
}

Semantic roles & 50–950 ramp

primary

#171B4D

secondary

#847F3C

accent

#D24ADD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171B4D

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

Preview Lab → · Contrast checker → · Palette generator →