#171E4B#171E4B

#171E4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.8% C 0.083 H 272.5°. Best body text is #FFFFFF at 15.86:1 contrast (WCAG AA passes).

Color values

HEX	#171E4B
RGB	rgb(23, 30, 75)
HSL	hsl(232, 53%, 19%)
HSV	hsv(232, 69%, 29%)
CMYK	cmyk(69.3%, 60%, 0%, 70.6%)
CIE-LAB	lab(13.34, 13.54, -28.98)
CIE-LCH	lch(13.34, 31.99, 295.04°)
OKLab	oklab(25.82% 0.0037 -0.0832)
OKLCH	oklch(25.82% 0.083 272.5)
XYZ	xyz(2.0872, 1.6185, 6.8577)
Luminance	0.0162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.90

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E4B #4B4417

analogous

#17384B #171E4B #2A174B

triadic

#171E4B #4B171E #1E4B17

tetradic

#171E4B #4B1738 #4B4417 #174B2A

square

#171E4B #4B1738 #4B4417 #174B2A

split-complementary

#171E4B #4B2A17 #384B17

monochromatic

#070917 #090B1C #171E4B #25317A #3443A9

Accessibility & contrast

On white

15.86

#171E4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#171E4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E4B

15.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E4B	#FFFFFF	#000000	##FFFFFF
##171E4B	1.00	15.86	1.32	15.86
#FFFFFF	15.86	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02254D

Deuteranopia (green-blind)

#00204A

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171e4b;
/* rgb */ color: rgb(23, 30, 75);
/* oklch */ color: oklch(25.8% 0.083 272.5);

Tailwind

colors: {
  custom: {
    50: '#5b597e',
    500: '#171e4b',
    950: '#000000',
  },
}

SCSS

$custom: #171e4b;
$custom-light: #5b597e;
$custom-dark: #000000;

JSON

{
  "hex": "#171e4b",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 75
  },
  "hsl": {
    "h": 231.923,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.25816,
    "c": 0.08328,
    "h": 272.5
  },
  "luminance": 0.01619
}

Semantic roles & 50–950 ramp

primary

#171E4B

secondary

#82793C

accent

#C94BDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #171E4B

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

Preview Lab → · Contrast checker → · Palette generator →