#171D66#171D66

#171D66 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.3% C 0.126 H 271.7°. Best body text is #FFFFFF at 14.96:1 contrast (WCAG AA passes).

Color values

HEX	#171D66
RGB	rgb(23, 29, 102)
HSL	hsl(235, 63%, 25%)
HSV	hsv(235, 77%, 40%)
CMYK	cmyk(77.5%, 71.6%, 0%, 60%)
CIE-LAB	lab(15.59, 25.12, -43.48)
CIE-LCH	lch(15.59, 50.21, 300.01°)
OKLab	oklab(28.26% 0.0037 -0.1257)
OKLCH	oklch(28.26% 0.126 271.7)
XYZ	xyz(3.1902, 2.0199, 12.7895)
Luminance	0.0202 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D66 #666017

analogous

#174566 #171D66 #391766

triadic

#171D66 #66171D #1D6617

tetradic

#171D66 #661745 #666017 #176639

square

#171D66 #661745 #666017 #176639

split-complementary

#171D66 #663917 #456617

monochromatic

#060719 #0C0F34 #171D66 #222B98 #2E39CA

Accessibility & contrast

On white

14.96

#171D66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#171D66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D66

14.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D66	#FFFFFF	#000000	##FFFFFF
##171D66	1.00	14.96	1.40	14.96
#FFFFFF	14.96	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	14.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B68

Deuteranopia (green-blind)

#002365

Tritanopia (blue-blind)

#00313E

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171d66;
/* rgb */ color: rgb(23, 29, 102);
/* oklch */ color: oklch(28.3% 0.126 271.7);

Tailwind

colors: {
  custom: {
    50: '#625992',
    500: '#171d66',
    950: '#000000',
  },
}

SCSS

$custom: #171d66;
$custom-light: #625992;
$custom-dark: #000000;

JSON

{
  "hex": "#171d66",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 102
  },
  "hsl": {
    "h": 235.443,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.28259,
    "c": 0.1258,
    "h": 271.7
  },
  "luminance": 0.0202
}

Semantic roles & 50–950 ramp

primary

#171D66

secondary

#9C953C

accent

#DA42E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171D66

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

Preview Lab → · Contrast checker → · Palette generator →