#171C8C#171C8C

#171C8C is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.177 H 269.4°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#171C8C
RGB	rgb(23, 28, 140)
HSL	hsl(237, 72%, 32%)
HSV	hsv(237, 84%, 55%)
CMYK	cmyk(83.6%, 80%, 0%, 45.1%)
CIE-LAB	lab(19.66, 39.69, -61.11)
CIE-LCH	lch(19.66, 72.87, 303.00°)
OKLab	oklab(32.44% -0.0019 -0.177)
OKLCH	oklch(32.44% 0.177 269.4)
XYZ	xyz(5.5006, 2.9055, 25.0768)
Luminance	0.0291 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C8C #8C8717

analogous

#17578C #171C8C #4D178C

triadic

#171C8C #8C171C #1C8C17

tetradic

#171C8C #8C1757 #8C8717 #178C4D

square

#171C8C #8C1757 #8C8717 #178C4D

split-complementary

#171C8C #8C4D17 #578C17

monochromatic

#060723 #0E1157 #171C8C #2027C1 #3E45DF

Accessibility & contrast

On white

13.28

#171C8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#171C8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C8C

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C8C	#FFFFFF	#000000	##FFFFFF
##171C8C	1.00	13.28	1.58	13.28
#FFFFFF	13.28	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358F

Deuteranopia (green-blind)

#00298A

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171c8c;
/* rgb */ color: rgb(23, 28, 140);
/* oklch */ color: oklch(32.4% 0.177 269.4);

Tailwind

colors: {
  custom: {
    50: '#6d5aaf',
    500: '#171c8c',
    950: '#000000',
  },
}

SCSS

$custom: #171c8c;
$custom-light: #6d5aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#171c8c",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 140
  },
  "hsl": {
    "h": 237.436,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32436,
    "c": 0.17703,
    "h": 269.4
  },
  "luminance": 0.02906
}

Semantic roles & 50–950 ramp

primary

#171C8C

secondary

#BFBA3F

accent

#E739EF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #171C8C

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

Preview Lab → · Contrast checker → · Palette generator →