#171F55#171F55

#171F55 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.098 H 271.8°. Best body text is #FFFFFF at 15.40:1 contrast (WCAG AA passes).

Color values

HEX	#171F55
RGB	rgb(23, 31, 85)
HSL	hsl(232, 57%, 21%)
HSV	hsv(232, 73%, 33%)
CMYK	cmyk(72.9%, 63.5%, 0%, 66.7%)
CIE-LAB	lab(14.50, 16.88, -33.93)
CIE-LCH	lch(14.50, 37.89, 296.46°)
OKLab	oklab(26.95% 0.003 -0.0977)
OKLCH	oklch(26.95% 0.098 271.8)
XYZ	xyz(2.4825, 1.8178, 8.8126)
Luminance	0.0182 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F55 #554D17

analogous

#173E55 #171F55 #2E1755

triadic

#171F55 #55171F #1F5517

tetradic

#171F55 #55173E #554D17 #17552E

square

#171F55 #55173E #554D17 #17552E

split-complementary

#171F55 #552E17 #3E5517

monochromatic

#070918 #0A0D25 #171F55 #243185 #3142B5

Accessibility & contrast

On white

15.40

#171F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F55

15.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F55	#FFFFFF	#000000	##FFFFFF
##171F55	1.00	15.40	1.36	15.40
#FFFFFF	15.40	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002857

Deuteranopia (green-blind)

#002254

Tritanopia (blue-blind)

#002C36

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171f55;
/* rgb */ color: rgb(23, 31, 85);
/* oklch */ color: oklch(27.0% 0.098 271.8);

Tailwind

colors: {
  custom: {
    50: '#5d5a85',
    500: '#171f55',
    950: '#000000',
  },
}

SCSS

$custom: #171f55;
$custom-light: #5d5a85;
$custom-dark: #000000;

JSON

{
  "hex": "#171f55",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 85
  },
  "hsl": {
    "h": 232.258,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26952,
    "c": 0.09777,
    "h": 271.8
  },
  "luminance": 0.01818
}

Semantic roles & 50–950 ramp

primary

#171F55

secondary

#8C823C

accent

#CD47E1

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171F55

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

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