#171B75#171B75

#171B75 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.6% C 0.149 H 271.0°. Best body text is #FFFFFF at 14.48:1 contrast (WCAG AA passes).

Color values

HEX	#171B75
RGB	rgb(23, 27, 117)
HSL	hsl(237, 67%, 27%)
HSV	hsv(237, 80%, 46%)
CMYK	cmyk(80.3%, 76.9%, 0%, 54.1%)
CIE-LAB	lab(16.75, 32.11, -51.34)
CIE-LCH	lch(16.75, 60.56, 302.02°)
OKLab	oklab(29.58% 0.0026 -0.1487)
OKLCH	oklch(29.58% 0.149 271)
XYZ	xyz(3.9551, 2.2499, 17.0520)
Luminance	0.0225 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B75 #757117

analogous

#174A75 #171B75 #421775

triadic

#171B75 #75171B #1B7517

tetradic

#171B75 #75174A #757117 #177542

square

#171B75 #75174A #757117 #177542

split-complementary

#171B75 #754217 #4A7517

monochromatic

#05061A #0D0F42 #171B75 #2127A8 #3037D6

Accessibility & contrast

On white

14.48

#171B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#171B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B75

14.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B75	#FFFFFF	#000000	##FFFFFF
##171B75	1.00	14.48	1.45	14.48
#FFFFFF	14.48	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E78

Deuteranopia (green-blind)

#002573

Tritanopia (blue-blind)

#003546

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #171b75;
/* rgb */ color: rgb(23, 27, 117);
/* oklch */ color: oklch(29.6% 0.149 271.0);

Tailwind

colors: {
  custom: {
    50: '#66589e',
    500: '#171b75',
    950: '#000000',
  },
}

SCSS

$custom: #171b75;
$custom-light: #66589e;
$custom-dark: #000000;

JSON

{
  "hex": "#171b75",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 117
  },
  "hsl": {
    "h": 237.447,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.29581,
    "c": 0.14868,
    "h": 271
  },
  "luminance": 0.0225
}

Semantic roles & 50–950 ramp

primary

#171B75

secondary

#AAA63D

accent

#E33EEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171B75

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

Preview Lab → · Contrast checker → · Palette generator →