#171F63#171F63

#171F63 is a dark, moderate blue. Relative luminance 0.021; OKLCH L 28.3% C 0.119 H 271.2°. Best body text is #FFFFFF at 14.87:1 contrast (WCAG AA passes).

Color values

HEX	#171F63
RGB	rgb(23, 31, 99)
HSL	hsl(234, 62%, 24%)
HSV	hsv(234, 77%, 39%)
CMYK	cmyk(76.8%, 68.7%, 0%, 61.2%)
CIE-LAB	lab(15.81, 22.54, -41.14)
CIE-LCH	lch(15.81, 46.91, 298.71°)
OKLab	oklab(28.33% 0.0025 -0.1189)
OKLCH	oklch(28.33% 0.119 271.2)
XYZ	xyz(3.0947, 2.0627, 12.0370)
Luminance	0.0206 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F63 #635B17

analogous

#174563 #171F63 #351763

triadic

#171F63 #63171F #1F6317

tetradic

#171F63 #631745 #635B17 #176335

square

#171F63 #631745 #635B17 #176335

split-complementary

#171F63 #633517 #456317

monochromatic

#060819 #0B0F31 #171F63 #232F95 #2E3EC6

Accessibility & contrast

On white

14.87

#171F63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#171F63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F63

14.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F63	#FFFFFF	#000000	##FFFFFF
##171F63	1.00	14.87	1.41	14.87
#FFFFFF	14.87	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B65

Deuteranopia (green-blind)

#002462

Tritanopia (blue-blind)

#00313E

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171f63;
/* rgb */ color: rgb(23, 31, 99);
/* oklch */ color: oklch(28.3% 0.119 271.2);

Tailwind

colors: {
  custom: {
    50: '#615a90',
    500: '#171f63',
    950: '#000000',
  },
}

SCSS

$custom: #171f63;
$custom-light: #615a90;
$custom-dark: #000000;

JSON

{
  "hex": "#171f63",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 99
  },
  "hsl": {
    "h": 233.684,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.28328,
    "c": 0.11891,
    "h": 271.2
  },
  "luminance": 0.02063
}

Semantic roles & 50–950 ramp

primary

#171F63

secondary

#9A903C

accent

#D442E5

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06040D

muted

#7A797D

Preview Lab

Preview with #171F63

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

Preview Lab → · Contrast checker → · Palette generator →