#171F5A#171F5A

#171F5A is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.4% C 0.105 H 271.6°. Best body text is #FFFFFF at 15.22:1 contrast (WCAG AA passes).

Color values

HEX	#171F5A
RGB	rgb(23, 31, 90)
HSL	hsl(233, 59%, 22%)
HSV	hsv(233, 74%, 35%)
CMYK	cmyk(74.4%, 65.6%, 0%, 64.7%)
CIE-LAB	lab(14.95, 18.92, -36.55)
CIE-LCH	lch(14.95, 41.16, 297.36°)
OKLab	oklab(27.43% 0.003 -0.1054)
OKLCH	oklch(27.43% 0.105 271.6)
XYZ	xyz(2.6882, 1.9001, 9.8960)
Luminance	0.0190 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F5A #5A5217

analogous

#17415A #171F5A #31175A

triadic

#171F5A #5A171F #1F5A17

tetradic

#171F5A #5A1741 #5A5217 #175A31

square

#171F5A #5A1741 #5A5217 #175A31

split-complementary

#171F5A #5A3117 #415A17

monochromatic

#060818 #0B0E29 #171F5A #23308B #3041BB

Accessibility & contrast

On white

15.22

#171F5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#171F5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F5A

15.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F5A	#FFFFFF	#000000	##FFFFFF
##171F5A	1.00	15.22	1.38	15.22
#FFFFFF	15.22	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295C

Deuteranopia (green-blind)

#002359

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171f5a;
/* rgb */ color: rgb(23, 31, 90);
/* oklch */ color: oklch(27.4% 0.105 271.6);

Tailwind

colors: {
  custom: {
    50: '#5e5a89',
    500: '#171f5a',
    950: '#000000',
  },
}

SCSS

$custom: #171f5a;
$custom-light: #5e5a89;
$custom-dark: #000000;

JSON

{
  "hex": "#171f5a",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 90
  },
  "hsl": {
    "h": 232.836,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.2743,
    "c": 0.10548,
    "h": 271.6
  },
  "luminance": 0.019
}

Semantic roles & 50–950 ramp

primary

#171F5A

secondary

#91873C

accent

#D045E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171F5A

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

Preview Lab → · Contrast checker → · Palette generator →