#171C8E#171C8E

#171C8E is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.179 H 269.3°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#171C8E
RGB	rgb(23, 28, 142)
HSL	hsl(237, 72%, 32%)
HSV	hsv(237, 84%, 56%)
CMYK	cmyk(83.8%, 80.3%, 0%, 44.3%)
CIE-LAB	lab(19.90, 40.38, -61.96)
CIE-LCH	lch(19.90, 73.95, 303.09°)
OKLab	oklab(32.68% -0.0022 -0.1795)
OKLCH	oklch(32.68% 0.179 269.3)
XYZ	xyz(5.6494, 2.9650, 25.8605)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C8E #8E8917

analogous

#17588E #171C8E #4E178E

triadic

#171C8E #8E171C #1C8E17

tetradic

#171C8E #8E1758 #8E8917 #178E4E

square

#171C8E #8E1758 #8E8917 #178E4E

split-complementary

#171C8E #8E4E17 #588E17

monochromatic

#060725 #0E1259 #171C8E #2026C3 #3F46E0

Accessibility & contrast

On white

13.18

#171C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#171C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C8E

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C8E	#FFFFFF	#000000	##FFFFFF
##171C8E	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171c8e;
/* rgb */ color: rgb(23, 28, 142);
/* oklch */ color: oklch(32.7% 0.179 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d5ab0',
    500: '#171c8e',
    950: '#000000',
  },
}

SCSS

$custom: #171c8e;
$custom-light: #6d5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#171c8e",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 142
  },
  "hsl": {
    "h": 237.479,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32676,
    "c": 0.17948,
    "h": 269.3
  },
  "luminance": 0.02966
}

Semantic roles & 50–950 ramp

primary

#171C8E

secondary

#C0BB40

accent

#E739EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171C8E

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

Preview Lab → · Contrast checker → · Palette generator →