#171D88#171D88

#171D88 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.171 H 269.5°. Best body text is #FFFFFF at 13.40:1 contrast (WCAG AA passes).

Color values

HEX	#171D88
RGB	rgb(23, 29, 136)
HSL	hsl(237, 71%, 31%)
HSV	hsv(237, 83%, 53%)
CMYK	cmyk(83.1%, 78.7%, 0%, 46.7%)
CIE-LAB	lab(19.38, 37.73, -59.07)
CIE-LCH	lch(19.38, 70.09, 302.57°)
OKLab	oklab(32.1% -0.0014 -0.1711)
OKLCH	oklch(32.1% 0.171 269.5)
XYZ	xyz(5.2351, 2.8378, 23.5596)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D88 #888217

analogous

#175588 #171D88 #491788

triadic

#171D88 #88171D #1D8817

tetradic

#171D88 #881755 #888217 #178849

square

#171D88 #881755 #888217 #178849

split-complementary

#171D88 #884917 #558817

monochromatic

#05071F #0E1254 #171D88 #2028BC #3B44DE

Accessibility & contrast

On white

13.40

#171D88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#171D88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D88

13.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D88	#FFFFFF	#000000	##FFFFFF
##171D88	1.00	13.40	1.57	13.40
#FFFFFF	13.40	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358B

Deuteranopia (green-blind)

#002986

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #171d88;
/* rgb */ color: rgb(23, 29, 136);
/* oklch */ color: oklch(32.1% 0.171 269.5);

Tailwind

colors: {
  custom: {
    50: '#6c5bac',
    500: '#171d88',
    950: '#000000',
  },
}

SCSS

$custom: #171d88;
$custom-light: #6c5bac;
$custom-dark: #000000;

JSON

{
  "hex": "#171d88",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 136
  },
  "hsl": {
    "h": 236.814,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.321,
    "c": 0.17112,
    "h": 269.5
  },
  "luminance": 0.02838
}

Semantic roles & 50–950 ramp

primary

#171D88

secondary

#BCB53F

accent

#E43AEE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #171D88

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

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