#171D64#171D64

#171D64 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.0% C 0.123 H 271.8°. Best body text is #FFFFFF at 15.04:1 contrast (WCAG AA passes).

Color values

HEX	#171D64
RGB	rgb(23, 29, 100)
HSL	hsl(235, 63%, 24%)
HSV	hsv(235, 77%, 39%)
CMYK	cmyk(77%, 71%, 0%, 60.8%)
CIE-LAB	lab(15.39, 24.33, -42.50)
CIE-LCH	lch(15.39, 48.97, 299.79°)
OKLab	oklab(28.05% 0.0039 -0.1229)
OKLCH	oklch(28.05% 0.123 271.8)
XYZ	xyz(3.0922, 1.9807, 12.2735)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D64 #645E17

analogous

#174464 #171D64 #381764

triadic

#171D64 #64171D #1D6417

tetradic

#171D64 #641744 #645E17 #176438

square

#171D64 #641744 #645E17 #176438

split-complementary

#171D64 #643817 #446417

monochromatic

#060719 #0C0F32 #171D64 #222B96 #2E3AC8

Accessibility & contrast

On white

15.04

#171D64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#171D64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D64

15.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D64	#FFFFFF	#000000	##FFFFFF
##171D64	1.00	15.04	1.40	15.04
#FFFFFF	15.04	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A66

Deuteranopia (green-blind)

#002363

Tritanopia (blue-blind)

#00303D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171d64;
/* rgb */ color: rgb(23, 29, 100);
/* oklch */ color: oklch(28.0% 0.123 271.8);

Tailwind

colors: {
  custom: {
    50: '#615991',
    500: '#171d64',
    950: '#000000',
  },
}

SCSS

$custom: #171d64;
$custom-light: #615991;
$custom-dark: #000000;

JSON

{
  "hex": "#171d64",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 100
  },
  "hsl": {
    "h": 235.325,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.28047,
    "c": 0.12294,
    "h": 271.8
  },
  "luminance": 0.01981
}

Semantic roles & 50–950 ramp

primary

#171D64

secondary

#9A933C

accent

#D942E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171D64

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

Preview Lab → · Contrast checker → · Palette generator →