#171F8F#171F8F

#171F8F is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.2% C 0.178 H 269.0°. Best body text is #FFFFFF at 12.89:1 contrast (WCAG AA passes).

Color values

HEX	#171F8F
RGB	rgb(23, 31, 143)
HSL	hsl(236, 72%, 33%)
HSV	hsv(236, 84%, 56%)
CMYK	cmyk(83.9%, 78.3%, 0%, 43.9%)
CIE-LAB	lab(20.61, 39.03, -61.40)
CIE-LCH	lch(20.61, 72.75, 302.44°)
OKLab	oklab(33.21% -0.0032 -0.1779)
OKLCH	oklch(33.21% 0.178 269)
XYZ	xyz(5.7996, 3.1446, 26.2826)
Luminance	0.0314 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F8F #8F8717

analogous

#175B8F #171F8F #4B178F

triadic

#171F8F #8F171F #1F8F17

tetradic

#171F8F #8F175B #8F8717 #178F4B

square

#171F8F #8F175B #8F8717 #178F4B

split-complementary

#171F8F #8F4B17 #5B8F17

monochromatic

#060826 #0F145A #171F8F #1F2AC4 #404BE0

Accessibility & contrast

On white

12.89

#171F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#171F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F8F

12.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F8F	#FFFFFF	#000000	##FFFFFF
##171F8F	1.00	12.89	1.63	12.89
#FFFFFF	12.89	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003892

Deuteranopia (green-blind)

#002B8D

Tritanopia (blue-blind)

#004156

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #171f8f;
/* rgb */ color: rgb(23, 31, 143);
/* oklch */ color: oklch(33.2% 0.178 269.0);

Tailwind

colors: {
  custom: {
    50: '#6d5cb1',
    500: '#171f8f',
    950: '#000000',
  },
}

SCSS

$custom: #171f8f;
$custom-light: #6d5cb1;
$custom-dark: #000000;

JSON

{
  "hex": "#171f8f",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 143
  },
  "hsl": {
    "h": 236,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33212,
    "c": 0.17793,
    "h": 269
  },
  "luminance": 0.03145
}

Semantic roles & 50–950 ramp

primary

#171F8F

secondary

#C1B841

accent

#E339EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171F8F

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

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