#171C63#171C63

#171C63 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.8% C 0.123 H 272.2°. Best body text is #FFFFFF at 15.19:1 contrast (WCAG AA passes).

Color values

HEX	#171C63
RGB	rgb(23, 28, 99)
HSL	hsl(236, 62%, 24%)
HSV	hsv(236, 77%, 39%)
CMYK	cmyk(76.8%, 71.7%, 0%, 61.2%)
CIE-LAB	lab(15.03, 24.64, -42.43)
CIE-LCH	lch(15.03, 49.06, 300.14°)
OKLab	oklab(27.75% 0.0047 -0.1227)
OKLCH	oklch(27.75% 0.123 272.2)
XYZ	xyz(3.0200, 1.9132, 12.0121)
Luminance	0.0191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C63 #635E17

analogous

#174263 #171C63 #381763

triadic

#171C63 #63171C #1C6317

tetradic

#171C63 #631742 #635E17 #176338

square

#171C63 #631742 #635E17 #176338

split-complementary

#171C63 #633817 #426317

monochromatic

#060719 #0B0E31 #171C63 #232A95 #2E38C6

Accessibility & contrast

On white

15.19

#171C63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#171C63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C63

15.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C63	#FFFFFF	#000000	##FFFFFF
##171C63	1.00	15.19	1.38	15.19
#FFFFFF	15.19	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002965

Deuteranopia (green-blind)

#002262

Tritanopia (blue-blind)

#002F3D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171c63;
/* rgb */ color: rgb(23, 28, 99);
/* oklch */ color: oklch(27.8% 0.123 272.2);

Tailwind

colors: {
  custom: {
    50: '#615890',
    500: '#171c63',
    950: '#000000',
  },
}

SCSS

$custom: #171c63;
$custom-light: #615890;
$custom-dark: #000000;

JSON

{
  "hex": "#171c63",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 99
  },
  "hsl": {
    "h": 236.053,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.27754,
    "c": 0.12277,
    "h": 272.2
  },
  "luminance": 0.01914
}

Semantic roles & 50–950 ramp

primary

#171C63

secondary

#9A933C

accent

#DB42E5

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030D

muted

#7A787D

Preview Lab

Preview with #171C63

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

Preview Lab → · Contrast checker → · Palette generator →