#171B48#171B48

#171B48 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.083 H 274.8°. Best body text is #FFFFFF at 16.32:1 contrast (WCAG AA passes).

Color values

HEX	#171B48
RGB	rgb(23, 27, 72)
HSL	hsl(235, 52%, 19%)
HSV	hsv(235, 68%, 28%)
CMYK	cmyk(68.1%, 62.5%, 0%, 71.8%)
CIE-LAB	lab(12.18, 14.58, -28.79)
CIE-LCH	lch(12.18, 32.27, 296.85°)
OKLab	oklab(24.87% 0.0069 -0.0827)
OKLCH	oklch(24.87% 0.083 274.8)
XYZ	xyz(1.9146, 1.4338, 6.3055)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B48 #484417

analogous

#173348 #171B48 #2B1748

triadic

#171B48 #48171B #1B4817

tetradic

#171B48 #481733 #484417 #17482B

square

#171B48 #481733 #484417 #17482B

split-complementary

#171B48 #482B17 #334817

monochromatic

#070917 #080A1A #171B48 #262C76 #353EA5

Accessibility & contrast

On white

16.32

#171B48 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#171B48 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B48

16.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B48	#FFFFFF	#000000	##FFFFFF
##171B48	1.00	16.32	1.29	16.32
#FFFFFF	16.32	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00224A

Deuteranopia (green-blind)

#001E47

Tritanopia (blue-blind)

#00262E

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #171b48;
/* rgb */ color: rgb(23, 27, 72);
/* oklch */ color: oklch(24.9% 0.083 274.8);

Tailwind

colors: {
  custom: {
    50: '#5a577b',
    500: '#171b48',
    950: '#000000',
  },
}

SCSS

$custom: #171b48;
$custom-light: #5a577b;
$custom-dark: #000000;

JSON

{
  "hex": "#171b48",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 72
  },
  "hsl": {
    "h": 235.102,
    "s": 51.579,
    "l": 18.627
  },
  "oklch": {
    "l": 0.24867,
    "c": 0.08296,
    "h": 274.8
  },
  "luminance": 0.01434
}

Semantic roles & 50–950 ramp

primary

#171B48

secondary

#7F7A3C

accent

#CF4DDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #171B48

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

Preview Lab → · Contrast checker → · Palette generator →