#171F65#171F65

#171F65 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.5% C 0.122 H 271.1°. Best body text is #FFFFFF at 14.78:1 contrast (WCAG AA passes).

Color values

HEX	#171F65
RGB	rgb(23, 31, 101)
HSL	hsl(234, 63%, 24%)
HSV	hsv(234, 77%, 40%)
CMYK	cmyk(77.2%, 69.3%, 0%, 60.4%)
CIE-LAB	lab(16.01, 23.33, -42.13)
CIE-LCH	lch(16.01, 48.16, 298.98°)
OKLab	oklab(28.53% 0.0024 -0.1218)
OKLCH	oklch(28.53% 0.122 271.1)
XYZ	xyz(3.1915, 2.1014, 12.5468)
Luminance	0.0210 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F65 #655D17

analogous

#174665 #171F65 #361765

triadic

#171F65 #65171F #1F6517

tetradic

#171F65 #651746 #655D17 #176536

square

#171F65 #651746 #655D17 #176536

split-complementary

#171F65 #653617 #466517

monochromatic

#060819 #0C1033 #171F65 #222E97 #2E3EC9

Accessibility & contrast

On white

14.78

#171F65 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#171F65 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F65

14.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F65	#FFFFFF	#000000	##FFFFFF
##171F65	1.00	14.78	1.42	14.78
#FFFFFF	14.78	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B67

Deuteranopia (green-blind)

#002464

Tritanopia (blue-blind)

#00313F

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171f65;
/* rgb */ color: rgb(23, 31, 101);
/* oklch */ color: oklch(28.5% 0.122 271.1);

Tailwind

colors: {
  custom: {
    50: '#615a92',
    500: '#171f65',
    950: '#000000',
  },
}

SCSS

$custom: #171f65;
$custom-light: #615a92;
$custom-dark: #000000;

JSON

{
  "hex": "#171f65",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 101
  },
  "hsl": {
    "h": 233.846,
    "s": 62.903,
    "l": 24.314
  },
  "oklch": {
    "l": 0.28534,
    "c": 0.12182,
    "h": 271.1
  },
  "luminance": 0.02102
}

Semantic roles & 50–950 ramp

primary

#171F65

secondary

#9B923C

accent

#D542E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06040D

muted

#7A797E

Preview Lab

Preview with #171F65

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

Preview Lab → · Contrast checker → · Palette generator →