#171B54#171B54

#171B54 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.0% C 0.102 H 273.8°. Best body text is #FFFFFF at 15.89:1 contrast (WCAG AA passes).

Color values

HEX	#171B54
RGB	rgb(23, 27, 84)
HSL	hsl(236, 57%, 21%)
HSV	hsv(236, 73%, 33%)
CMYK	cmyk(72.6%, 67.9%, 0%, 67.1%)
CIE-LAB	lab(13.27, 19.41, -35.26)
CIE-LCH	lch(13.27, 40.25, 298.83°)
OKLab	oklab(26.01% 0.0068 -0.1017)
OKLCH	oklch(26.01% 0.102 273.8)
XYZ	xyz(2.3450, 1.6059, 8.5722)
Luminance	0.0161 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B54 #545017

analogous

#173954 #171B54 #311754

triadic

#171B54 #54171B #1B5417

tetradic

#171B54 #541739 #545017 #175431

square

#171B54 #541739 #545017 #175431

split-complementary

#171B54 #543117 #395417

monochromatic

#070818 #0A0C24 #171B54 #242A84 #313AB4

Accessibility & contrast

On white

15.89

#171B54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#171B54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B54

15.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B54	#FFFFFF	#000000	##FFFFFF
##171B54	1.00	15.89	1.32	15.89
#FFFFFF	15.89	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002556

Deuteranopia (green-blind)

#001F53

Tritanopia (blue-blind)

#002934

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171b54;
/* rgb */ color: rgb(23, 27, 84);
/* oklch */ color: oklch(26.0% 0.102 273.8);

Tailwind

colors: {
  custom: {
    50: '#5d5785',
    500: '#171b54',
    950: '#000000',
  },
}

SCSS

$custom: #171b54;
$custom-light: #5d5785;
$custom-dark: #000000;

JSON

{
  "hex": "#171b54",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 84
  },
  "hsl": {
    "h": 236.066,
    "s": 57.009,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26011,
    "c": 0.10191,
    "h": 273.8
  },
  "luminance": 0.01606
}

Semantic roles & 50–950 ramp

primary

#171B54

secondary

#8B863C

accent

#D648E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171B54

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

Preview Lab → · Contrast checker → · Palette generator →