#171B5B#171B5B

#171B5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.7% C 0.112 H 273.2°. Best body text is #FFFFFF at 15.62:1 contrast (WCAG AA passes).

Color values

HEX	#171B5B
RGB	rgb(23, 27, 91)
HSL	hsl(236, 60%, 22%)
HSV	hsv(236, 75%, 36%)
CMYK	cmyk(74.7%, 70.3%, 0%, 64.3%)
CIE-LAB	lab(13.95, 22.20, -38.86)
CIE-LCH	lch(13.95, 44.76, 299.73°)
OKLab	oklab(26.72% 0.0062 -0.1122)
OKLCH	oklch(26.72% 0.112 273.2)
XYZ	xyz(2.6330, 1.7211, 10.0889)
Luminance	0.0172 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B5B #5B5717

analogous

#173D5B #171B5B #35175B

triadic

#171B5B #5B171B #1B5B17

tetradic

#171B5B #5B173D #5B5717 #175B35

square

#171B5B #5B173D #5B5717 #175B35

split-complementary

#171B5B #5B3517 #3D5B17

monochromatic

#060718 #0B0D2A #171B5B #23298C #3038BD

Accessibility & contrast

On white

15.62

#171B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B5B

15.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B5B	#FFFFFF	#000000	##FFFFFF
##171B5B	1.00	15.62	1.34	15.62
#FFFFFF	15.62	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171b5b;
/* rgb */ color: rgb(23, 27, 91);
/* oklch */ color: oklch(26.7% 0.112 273.2);

Tailwind

colors: {
  custom: {
    50: '#5f578a',
    500: '#171b5b',
    950: '#000000',
  },
}

SCSS

$custom: #171b5b;
$custom-light: #5f578a;
$custom-dark: #000000;

JSON

{
  "hex": "#171b5b",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 91
  },
  "hsl": {
    "h": 236.471,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26723,
    "c": 0.11242,
    "h": 273.2
  },
  "luminance": 0.01721
}

Semantic roles & 50–950 ramp

primary

#171B5B

secondary

#928D3C

accent

#DA45E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171B5B

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

Preview Lab → · Contrast checker → · Palette generator →