#171C64#171C64

#171C64 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.9% C 0.124 H 272.1°. Best body text is #FFFFFF at 15.14:1 contrast (WCAG AA passes).

Color values

HEX	#171C64
RGB	rgb(23, 28, 100)
HSL	hsl(236, 63%, 24%)
HSV	hsv(236, 77%, 39%)
CMYK	cmyk(77%, 72%, 0%, 60.8%)
CIE-LAB	lab(15.13, 25.02, -42.92)
CIE-LCH	lch(15.13, 49.68, 300.24°)
OKLab	oklab(27.86% 0.0046 -0.1241)
OKLCH	oklch(27.86% 0.124 272.1)
XYZ	xyz(3.0681, 1.9325, 12.2654)
Luminance	0.0193 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C64 #645F17

analogous

#174364 #171C64 #391764

triadic

#171C64 #64171C #1C6417

tetradic

#171C64 #641743 #645F17 #176439

square

#171C64 #641743 #645F17 #176439

split-complementary

#171C64 #643917 #436417

monochromatic

#060719 #0C0E32 #171C64 #222A96 #2E38C8

Accessibility & contrast

On white

15.14

#171C64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#171C64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C64

15.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C64	#FFFFFF	#000000	##FFFFFF
##171C64	1.00	15.14	1.39	15.14
#FFFFFF	15.14	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A66

Deuteranopia (green-blind)

#002263

Tritanopia (blue-blind)

#002F3D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171c64;
/* rgb */ color: rgb(23, 28, 100);
/* oklch */ color: oklch(27.9% 0.124 272.1);

Tailwind

colors: {
  custom: {
    50: '#615891',
    500: '#171c64',
    950: '#000000',
  },
}

SCSS

$custom: #171c64;
$custom-light: #615891;
$custom-dark: #000000;

JSON

{
  "hex": "#171c64",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 100
  },
  "hsl": {
    "h": 236.104,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.27861,
    "c": 0.12419,
    "h": 272.1
  },
  "luminance": 0.01933
}

Semantic roles & 50–950 ramp

primary

#171C64

secondary

#9A943C

accent

#DB42E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171C64

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

Preview Lab → · Contrast checker → · Palette generator →