#171F4A#171F4A

#171F4A is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.0% C 0.080 H 271.8°. Best body text is #FFFFFF at 15.77:1 contrast (WCAG AA passes).

Color values

HEX	#171F4A
RGB	rgb(23, 31, 74)
HSL	hsl(231, 53%, 19%)
HSV	hsv(231, 69%, 29%)
CMYK	cmyk(68.9%, 58.1%, 0%, 71%)
CIE-LAB	lab(13.57, 12.38, -27.93)
CIE-LCH	lch(13.57, 30.55, 293.90°)
OKLab	oklab(25.96% 0.0025 -0.0801)
OKLCH	oklch(25.96% 0.08 271.8)
XYZ	xyz(2.0790, 1.6564, 6.6874)
Luminance	0.0166 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F4A #4A4217

analogous

#17394A #171F4A #29174A

triadic

#171F4A #4A171F #1F4A17

tetradic

#171F4A #4A1739 #4A4217 #174A29

square

#171F4A #4A1739 #4A4217 #174A29

split-complementary

#171F4A #4A2917 #394A17

monochromatic

#070A17 #080B1B #171F4A #263379 #3446A7

Accessibility & contrast

On white

15.77

#171F4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#171F4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F4A

15.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F4A	#FFFFFF	#000000	##FFFFFF
##171F4A	1.00	15.77	1.33	15.77
#FFFFFF	15.77	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06254C

Deuteranopia (green-blind)

#002149

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171f4a;
/* rgb */ color: rgb(23, 31, 74);
/* oklch */ color: oklch(26.0% 0.080 271.8);

Tailwind

colors: {
  custom: {
    50: '#5a5a7d',
    500: '#171f4a',
    950: '#000000',
  },
}

SCSS

$custom: #171f4a;
$custom-light: #5a5a7d;
$custom-dark: #000000;

JSON

{
  "hex": "#171f4a",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 74
  },
  "hsl": {
    "h": 230.588,
    "s": 52.577,
    "l": 19.02
  },
  "oklch": {
    "l": 0.25961,
    "c": 0.08012,
    "h": 271.8
  },
  "luminance": 0.01657
}

Semantic roles & 50–950 ramp

primary

#171F4A

secondary

#81763C

accent

#C54CDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #171F4A

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

Preview Lab → · Contrast checker → · Palette generator →