#171B6C#171B6C

#171B6C is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.6% C 0.137 H 271.7°. Best body text is #FFFFFF at 14.90:1 contrast (WCAG AA passes).

Color values

HEX	#171B6C
RGB	rgb(23, 27, 108)
HSL	hsl(237, 65%, 26%)
HSV	hsv(237, 79%, 42%)
CMYK	cmyk(78.7%, 75%, 0%, 57.6%)
CIE-LAB	lab(15.74, 28.76, -47.17)
CIE-LCH	lch(15.74, 55.25, 301.37°)
OKLab	oklab(28.56% 0.0041 -0.1365)
OKLCH	oklch(28.56% 0.137 271.7)
XYZ	xyz(3.4511, 2.0484, 14.3979)
Luminance	0.0205 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B6C #6C6817

analogous

#17456C #171B6C #3D176C

triadic

#171B6C #6C171B #1B6C17

tetradic

#171B6C #6C1745 #6C6817 #176C3D

square

#171B6C #6C1745 #6C6817 #176C3D

split-complementary

#171B6C #6C3D17 #456C17

monochromatic

#050619 #0C0E3A #171B6C #22289E #2C34D1

Accessibility & contrast

On white

14.90

#171B6C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#171B6C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6C

14.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B6C	#FFFFFF	#000000	##FFFFFF
##171B6C	1.00	14.90	1.41	14.90
#FFFFFF	14.90	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6E

Deuteranopia (green-blind)

#00236B

Tritanopia (blue-blind)

#003241

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171b6c;
/* rgb */ color: rgb(23, 27, 108);
/* oklch */ color: oklch(28.6% 0.137 271.7);

Tailwind

colors: {
  custom: {
    50: '#645897',
    500: '#171b6c',
    950: '#000000',
  },
}

SCSS

$custom: #171b6c;
$custom-light: #645897;
$custom-dark: #000000;

JSON

{
  "hex": "#171b6c",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 108
  },
  "hsl": {
    "h": 237.176,
    "s": 64.885,
    "l": 25.686
  },
  "oklch": {
    "l": 0.2856,
    "c": 0.13658,
    "h": 271.7
  },
  "luminance": 0.02049
}

Semantic roles & 50–950 ramp

primary

#171B6C

secondary

#A29D3D

accent

#E040E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030E

muted

#7A787E

Preview Lab

Preview with #171B6C

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

Preview Lab → · Contrast checker → · Palette generator →