#171D8C#171D8C

#171D8C is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.6% C 0.176 H 269.3°. Best body text is #FFFFFF at 13.20:1 contrast (WCAG AA passes).

Color values

HEX	#171D8C
RGB	rgb(23, 29, 140)
HSL	hsl(237, 72%, 32%)
HSV	hsv(237, 84%, 55%)
CMYK	cmyk(83.6%, 79.3%, 0%, 45.1%)
CIE-LAB	lab(19.86, 39.13, -60.78)
CIE-LCH	lch(19.86, 72.29, 302.77°)
OKLab	oklab(32.57% -0.0021 -0.1761)
OKLCH	oklch(32.57% 0.176 269.3)
XYZ	xyz(5.5247, 2.9537, 25.0848)
Luminance	0.0295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D8C #8C8617

analogous

#17588C #171D8C #4C178C

triadic

#171D8C #8C171D #1D8C17

tetradic

#171D8C #8C1758 #8C8617 #178C4C

square

#171D8C #8C1758 #8C8617 #178C4C

split-complementary

#171D8C #8C4C17 #588C17

monochromatic

#060723 #0E1257 #171D8C #2028C1 #3E46DF

Accessibility & contrast

On white

13.20

#171D8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#171D8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D8C

13.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D8C	#FFFFFF	#000000	##FFFFFF
##171D8C	1.00	13.20	1.59	13.20
#FFFFFF	13.20	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368F

Deuteranopia (green-blind)

#002A8A

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171d8c;
/* rgb */ color: rgb(23, 29, 140);
/* oklch */ color: oklch(32.6% 0.176 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d5baf',
    500: '#171d8c',
    950: '#000000',
  },
}

SCSS

$custom: #171d8c;
$custom-light: #6d5baf;
$custom-dark: #000000;

JSON

{
  "hex": "#171d8c",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 140
  },
  "hsl": {
    "h": 236.923,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32574,
    "c": 0.1761,
    "h": 269.3
  },
  "luminance": 0.02954
}

Semantic roles & 50–950 ramp

primary

#171D8C

secondary

#BFB93F

accent

#E539EF

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #171D8C

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

Preview Lab → · Contrast checker → · Palette generator →