#171F8E#171F8E

#171F8E is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.177 H 269.0°. Best body text is #FFFFFF at 12.94:1 contrast (WCAG AA passes).

Color values

HEX	#171F8E
RGB	rgb(23, 31, 142)
HSL	hsl(236, 72%, 32%)
HSV	hsv(236, 84%, 56%)
CMYK	cmyk(83.8%, 78.2%, 0%, 44.3%)
CIE-LAB	lab(20.50, 38.67, -60.97)
CIE-LCH	lch(20.50, 72.20, 302.39°)
OKLab	oklab(33.09% -0.0031 -0.1767)
OKLCH	oklch(33.09% 0.177 269)
XYZ	xyz(5.7241, 3.1144, 25.8854)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F8E #8E8617

analogous

#175B8E #171F8E #4A178E

triadic

#171F8E #8E171F #1F8E17

tetradic

#171F8E #8E175B #8E8617 #178E4A

square

#171F8E #8E175B #8E8617 #178E4A

split-complementary

#171F8E #8E4A17 #5B8E17

monochromatic

#060825 #0E1459 #171F8E #202AC3 #3F4AE0

Accessibility & contrast

On white

12.94

#171F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#171F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F8E

12.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F8E	#FFFFFF	#000000	##FFFFFF
##171F8E	1.00	12.94	1.62	12.94
#FFFFFF	12.94	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003791

Deuteranopia (green-blind)

#002B8C

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #171f8e;
/* rgb */ color: rgb(23, 31, 142);
/* oklch */ color: oklch(33.1% 0.177 269.0);

Tailwind

colors: {
  custom: {
    50: '#6d5cb0',
    500: '#171f8e',
    950: '#000000',
  },
}

SCSS

$custom: #171f8e;
$custom-light: #6d5cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#171f8e",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 142
  },
  "hsl": {
    "h": 235.966,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.33094,
    "c": 0.17669,
    "h": 269
  },
  "luminance": 0.03115
}

Semantic roles & 50–950 ramp

primary

#171F8E

secondary

#C0B840

accent

#E339EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080411

muted

#7B7980

Preview Lab

Preview with #171F8E

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

Preview Lab → · Contrast checker → · Palette generator →