#171B4E#171B4E

#171B4E is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.4% C 0.093 H 274.3°. Best body text is #FFFFFF at 16.11:1 contrast (WCAG AA passes).

Color values

HEX	#171B4E
RGB	rgb(23, 27, 78)
HSL	hsl(236, 54%, 20%)
HSV	hsv(236, 71%, 31%)
CMYK	cmyk(70.5%, 65.4%, 0%, 69.4%)
CIE-LAB	lab(12.71, 17.00, -32.07)
CIE-LCH	lch(12.71, 36.30, 297.93°)
OKLab	oklab(25.43% 0.007 -0.0923)
OKLCH	oklch(25.43% 0.093 274.3)
XYZ	xyz(2.1200, 1.5159, 7.3871)
Luminance	0.0152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B4E #4E4A17

analogous

#17374E #171B4E #2E174E

triadic

#171B4E #4E171B #1B4E17

tetradic

#171B4E #4E1737 #4E4A17 #174E2E

square

#171B4E #4E1737 #4E4A17 #174E2E

split-complementary

#171B4E #4E2E17 #374E17

monochromatic

#070818 #090B1F #171B4E #252B7D #333CAD

Accessibility & contrast

On white

16.11

#171B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#171B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B4E

16.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B4E	#FFFFFF	#000000	##FFFFFF
##171B4E	1.00	16.11	1.30	16.11
#FFFFFF	16.11	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002350

Deuteranopia (green-blind)

#001F4D

Tritanopia (blue-blind)

#002831

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171b4e;
/* rgb */ color: rgb(23, 27, 78);
/* oklch */ color: oklch(25.4% 0.093 274.3);

Tailwind

colors: {
  custom: {
    50: '#5c5780',
    500: '#171b4e',
    950: '#000000',
  },
}

SCSS

$custom: #171b4e;
$custom-light: #5c5780;
$custom-dark: #000000;

JSON

{
  "hex": "#171b4e",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 78
  },
  "hsl": {
    "h": 235.636,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.25426,
    "c": 0.09258,
    "h": 274.3
  },
  "luminance": 0.01516
}

Semantic roles & 50–950 ramp

primary

#171B4E

secondary

#85803C

accent

#D34ADE

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171B4E

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

Preview Lab → · Contrast checker → · Palette generator →