#171E8F#171E8F

#171E8F is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.179 H 269.1°. Best body text is #FFFFFF at 12.97:1 contrast (WCAG AA passes).

Color values

HEX	#171E8F
RGB	rgb(23, 30, 143)
HSL	hsl(237, 72%, 33%)
HSV	hsv(237, 84%, 56%)
CMYK	cmyk(83.9%, 79%, 0%, 43.9%)
CIE-LAB	lab(20.41, 39.60, -61.73)
CIE-LCH	lch(20.41, 73.34, 302.68°)
OKLab	oklab(33.07% -0.0029 -0.1788)
OKLCH	oklch(33.07% 0.179 269.1)
XYZ	xyz(5.7738, 3.0932, 26.2740)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E8F #8F8817

analogous

#175A8F #171E8F #4C178F

triadic

#171E8F #8F171E #1E8F17

tetradic

#171E8F #8F175A #8F8817 #178F4C

square

#171E8F #8F175A #8F8817 #178F4C

split-complementary

#171E8F #8F4C17 #5A8F17

monochromatic

#060826 #0F135A #171E8F #1F29C4 #4049E0

Accessibility & contrast

On white

12.97

#171E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#171E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E8F

12.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E8F	#FFFFFF	#000000	##FFFFFF
##171E8F	1.00	12.97	1.62	12.97
#FFFFFF	12.97	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003792

Deuteranopia (green-blind)

#002B8D

Tritanopia (blue-blind)

#004056

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #171e8f;
/* rgb */ color: rgb(23, 30, 143);
/* oklch */ color: oklch(33.1% 0.179 269.1);

Tailwind

colors: {
  custom: {
    50: '#6d5cb1',
    500: '#171e8f',
    950: '#000000',
  },
}

SCSS

$custom: #171e8f;
$custom-light: #6d5cb1;
$custom-dark: #000000;

JSON

{
  "hex": "#171e8f",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 143
  },
  "hsl": {
    "h": 236.5,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.3307,
    "c": 0.17887,
    "h": 269.1
  },
  "luminance": 0.03094
}

Semantic roles & 50–950 ramp

primary

#171E8F

secondary

#C1B941

accent

#E439EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171E8F

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

Preview Lab → · Contrast checker → · Palette generator →