#171D63#171D63

#171D63 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 27.9% C 0.121 H 271.9°. Best body text is #FFFFFF at 15.08:1 contrast (WCAG AA passes).

Color values

HEX	#171D63
RGB	rgb(23, 29, 99)
HSL	hsl(235, 62%, 24%)
HSV	hsv(235, 77%, 39%)
CMYK	cmyk(76.8%, 70.7%, 0%, 61.2%)
CIE-LAB	lab(15.28, 23.94, -42.01)
CIE-LCH	lch(15.28, 48.35, 299.68°)
OKLab	oklab(27.94% 0.004 -0.1214)
OKLCH	oklch(27.94% 0.122 271.9)
XYZ	xyz(3.0441, 1.9614, 12.0201)
Luminance	0.0196 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D63 #635D17

analogous

#174363 #171D63 #371763

triadic

#171D63 #63171D #1D6317

tetradic

#171D63 #631743 #635D17 #176337

square

#171D63 #631743 #635D17 #176337

split-complementary

#171D63 #633717 #436317

monochromatic

#060719 #0B0E31 #171D63 #232C95 #2E3AC6

Accessibility & contrast

On white

15.08

#171D63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#171D63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D63

15.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D63	#FFFFFF	#000000	##FFFFFF
##171D63	1.00	15.08	1.39	15.08
#FFFFFF	15.08	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A65

Deuteranopia (green-blind)

#002362

Tritanopia (blue-blind)

#00303D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171d63;
/* rgb */ color: rgb(23, 29, 99);
/* oklch */ color: oklch(27.9% 0.121 271.9);

Tailwind

colors: {
  custom: {
    50: '#615990',
    500: '#171d63',
    950: '#000000',
  },
}

SCSS

$custom: #171d63;
$custom-light: #615990;
$custom-dark: #000000;

JSON

{
  "hex": "#171d63",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 99
  },
  "hsl": {
    "h": 235.263,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.27942,
    "c": 0.1215,
    "h": 271.9
  },
  "luminance": 0.01962
}

Semantic roles & 50–950 ramp

primary

#171D63

secondary

#9A923C

accent

#D942E5

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030D

muted

#7A787D

Preview Lab

Preview with #171D63

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

Preview Lab → · Contrast checker → · Palette generator →