#171D59#171D59

#171D59 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.9% C 0.107 H 272.5°. Best body text is #FFFFFF at 15.48:1 contrast (WCAG AA passes).

Color values

HEX	#171D59
RGB	rgb(23, 29, 89)
HSL	hsl(235, 59%, 22%)
HSV	hsv(235, 74%, 35%)
CMYK	cmyk(74.2%, 67.4%, 0%, 65.1%)
CIE-LAB	lab(14.30, 19.97, -36.95)
CIE-LCH	lch(14.30, 42.00, 298.39°)
OKLab	oklab(26.92% 0.0047 -0.1066)
OKLCH	oklch(26.92% 0.107 272.5)
XYZ	xyz(2.5953, 1.7819, 9.6564)
Luminance	0.0178 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D59 #595317

analogous

#173E59 #171D59 #321759

triadic

#171D59 #59171D #1D5917

tetradic

#171D59 #59173E #595317 #175932

square

#171D59 #59173E #595317 #175932

split-complementary

#171D59 #593217 #3E5917

monochromatic

#060818 #0A0D28 #171D59 #242D8A #303DBA

Accessibility & contrast

On white

15.48

#171D59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171D59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D59

15.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D59	#FFFFFF	#000000	##FFFFFF
##171D59	1.00	15.48	1.36	15.48
#FFFFFF	15.48	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275B

Deuteranopia (green-blind)

#002158

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171d59;
/* rgb */ color: rgb(23, 29, 89);
/* oklch */ color: oklch(26.9% 0.107 272.5);

Tailwind

colors: {
  custom: {
    50: '#5e5988',
    500: '#171d59',
    950: '#000000',
  },
}

SCSS

$custom: #171d59;
$custom-light: #5e5988;
$custom-dark: #000000;

JSON

{
  "hex": "#171d59",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 89
  },
  "hsl": {
    "h": 234.545,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26918,
    "c": 0.10673,
    "h": 272.5
  },
  "luminance": 0.01782
}

Semantic roles & 50–950 ramp

primary

#171D59

secondary

#90883C

accent

#D446E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171D59

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

Preview Lab → · Contrast checker → · Palette generator →