#171B64#171B64

#171B64 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.7% C 0.125 H 272.4°. Best body text is #FFFFFF at 15.25:1 contrast (WCAG AA passes).

Color values

HEX	#171B64
RGB	rgb(23, 27, 100)
HSL	hsl(237, 63%, 24%)
HSV	hsv(237, 77%, 39%)
CMYK	cmyk(77%, 73%, 0%, 60.8%)
CIE-LAB	lab(14.88, 25.71, -43.34)
CIE-LCH	lch(14.88, 50.39, 300.68°)
OKLab	oklab(27.68% 0.0052 -0.1253)
OKLCH	oklch(27.68% 0.125 272.4)
XYZ	xyz(3.0448, 1.8858, 12.2577)
Luminance	0.0189 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B64 #646017

analogous

#174264 #171B64 #3A1764

triadic

#171B64 #64171B #1B6417

tetradic

#171B64 #641742 #646017 #17643A

square

#171B64 #641742 #646017 #17643A

split-complementary

#171B64 #643A17 #426417

monochromatic

#060719 #0C0E32 #171B64 #222896 #2E36C8

Accessibility & contrast

On white

15.25

#171B64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#171B64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B64

15.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B64	#FFFFFF	#000000	##FFFFFF
##171B64	1.00	15.25	1.38	15.25
#FFFFFF	15.25	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002966

Deuteranopia (green-blind)

#002263

Tritanopia (blue-blind)

#002F3D

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171b64;
/* rgb */ color: rgb(23, 27, 100);
/* oklch */ color: oklch(27.7% 0.125 272.4);

Tailwind

colors: {
  custom: {
    50: '#625791',
    500: '#171b64',
    950: '#000000',
  },
}

SCSS

$custom: #171b64;
$custom-light: #625791;
$custom-dark: #000000;

JSON

{
  "hex": "#171b64",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 100
  },
  "hsl": {
    "h": 236.883,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.27678,
    "c": 0.12544,
    "h": 272.4
  },
  "luminance": 0.01886
}

Semantic roles & 50–950 ramp

primary

#171B64

secondary

#9A963C

accent

#DD42E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171B64

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

Preview Lab → · Contrast checker → · Palette generator →