#171B6A#171B6A

#171B6A is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.3% C 0.134 H 271.9°. Best body text is #FFFFFF at 14.99:1 contrast (WCAG AA passes).

Color values

HEX	#171B6A
RGB	rgb(23, 27, 106)
HSL	hsl(237, 64%, 25%)
HSV	hsv(237, 78%, 42%)
CMYK	cmyk(78.3%, 74.5%, 0%, 58.4%)
CIE-LAB	lab(15.52, 28.00, -46.22)
CIE-LCH	lch(15.52, 54.05, 301.21°)
OKLab	oklab(28.34% 0.0044 -0.1338)
OKLCH	oklch(28.34% 0.134 271.9)
XYZ	xyz(3.3459, 2.0063, 13.8438)
Luminance	0.0201 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B6A #6A6617

analogous

#17456A #171B6A #3C176A

triadic

#171B6A #6A171B #1B6A17

tetradic

#171B6A #6A1745 #6A6617 #176A3C

square

#171B6A #6A1745 #6A6617 #176A3C

split-complementary

#171B6A #6A3C17 #456A17

monochromatic

#050619 #0C0E38 #171B6A #22289C #2D35CF

Accessibility & contrast

On white

14.99

#171B6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#171B6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6A

14.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B6A	#FFFFFF	#000000	##FFFFFF
##171B6A	1.00	14.99	1.40	14.99
#FFFFFF	14.99	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	14.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6C

Deuteranopia (green-blind)

#002369

Tritanopia (blue-blind)

#003140

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171b6a;
/* rgb */ color: rgb(23, 27, 106);
/* oklch */ color: oklch(28.3% 0.134 271.9);

Tailwind

colors: {
  custom: {
    50: '#635896',
    500: '#171b6a',
    950: '#000000',
  },
}

SCSS

$custom: #171b6a;
$custom-light: #635896;
$custom-dark: #000000;

JSON

{
  "hex": "#171b6a",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 106
  },
  "hsl": {
    "h": 237.108,
    "s": 64.341,
    "l": 25.294
  },
  "oklch": {
    "l": 0.28337,
    "c": 0.13383,
    "h": 271.9
  },
  "luminance": 0.02007
}

Semantic roles & 50–950 ramp

primary

#171B6A

secondary

#A09B3D

accent

#DF40E7

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171B6A

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

Preview Lab → · Contrast checker → · Palette generator →