#171F66#171F66

#171F66 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.6% C 0.123 H 271.1°. Best body text is #FFFFFF at 14.75:1 contrast (WCAG AA passes).

Color values

HEX	#171F66
RGB	rgb(23, 31, 102)
HSL	hsl(234, 63%, 25%)
HSV	hsv(234, 77%, 40%)
CMYK	cmyk(77.5%, 69.6%, 0%, 60%)
CIE-LAB	lab(16.11, 23.73, -42.63)
CIE-LCH	lch(16.11, 48.79, 299.10°)
OKLab	oklab(28.64% 0.0023 -0.1232)
OKLCH	oklch(28.64% 0.123 271.1)
XYZ	xyz(3.2408, 2.1211, 12.8064)
Luminance	0.0212 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F66 #665E17

analogous

#174766 #171F66 #371766

triadic

#171F66 #66171F #1F6617

tetradic

#171F66 #661747 #665E17 #176637

square

#171F66 #661747 #665E17 #176637

split-complementary

#171F66 #663717 #476617

monochromatic

#060819 #0C1034 #171F66 #222E98 #2E3DCA

Accessibility & contrast

On white

14.75

#171F66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#171F66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F66

14.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F66	#FFFFFF	#000000	##FFFFFF
##171F66	1.00	14.75	1.42	14.75
#FFFFFF	14.75	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C68

Deuteranopia (green-blind)

#002465

Tritanopia (blue-blind)

#00323F

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171f66;
/* rgb */ color: rgb(23, 31, 102);
/* oklch */ color: oklch(28.6% 0.123 271.1);

Tailwind

colors: {
  custom: {
    50: '#625a92',
    500: '#171f66',
    950: '#000000',
  },
}

SCSS

$custom: #171f66;
$custom-light: #625a92;
$custom-dark: #000000;

JSON

{
  "hex": "#171f66",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 102
  },
  "hsl": {
    "h": 233.924,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.28637,
    "c": 0.12326,
    "h": 271.1
  },
  "luminance": 0.02121
}

Semantic roles & 50–950 ramp

primary

#171F66

secondary

#9C933C

accent

#D642E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06040D

muted

#7A797E

Preview Lab

Preview with #171F66

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

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