#171B47#171B47

#171B47 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.8% C 0.081 H 274.9°. Best body text is #FFFFFF at 16.35:1 contrast (WCAG AA passes).

Color values

HEX	#171B47
RGB	rgb(23, 27, 71)
HSL	hsl(235, 51%, 18%)
HSV	hsv(235, 68%, 28%)
CMYK	cmyk(67.6%, 62%, 0%, 72.2%)
CIE-LAB	lab(12.10, 14.17, -28.23)
CIE-LCH	lch(12.10, 31.59, 296.65°)
OKLab	oklab(24.78% 0.0069 -0.081)
OKLCH	oklch(24.78% 0.081 274.9)
XYZ	xyz(1.8822, 1.4208, 6.1351)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B47 #474317

analogous

#173347 #171B47 #2B1747

triadic

#171B47 #47171B #1B4717

tetradic

#171B47 #471733 #474317 #17472B

square

#171B47 #471733 #474317 #17472B

split-complementary

#171B47 #472B17 #334717

monochromatic

#070917 #080919 #171B47 #262D75 #353EA3

Accessibility & contrast

On white

16.35

#171B47 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#171B47 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B47

16.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B47	#FFFFFF	#000000	##FFFFFF
##171B47	1.00	16.35	1.28	16.35
#FFFFFF	16.35	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002249

Deuteranopia (green-blind)

#001E46

Tritanopia (blue-blind)

#00252D

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #171b47;
/* rgb */ color: rgb(23, 27, 71);
/* oklch */ color: oklch(24.8% 0.081 274.9);

Tailwind

colors: {
  custom: {
    50: '#5a577b',
    500: '#171b47',
    950: '#000000',
  },
}

SCSS

$custom: #171b47;
$custom-light: #5a577b;
$custom-dark: #000000;

JSON

{
  "hex": "#171b47",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 71
  },
  "hsl": {
    "h": 235,
    "s": 51.064,
    "l": 18.431
  },
  "oklch": {
    "l": 0.24777,
    "c": 0.08132,
    "h": 274.9
  },
  "luminance": 0.01421
}

Semantic roles & 50–950 ramp

primary

#171B47

secondary

#7E793C

accent

#CF4DDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #171B47

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

Preview Lab → · Contrast checker → · Palette generator →