#171C59#171C59

#171C59 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.7% C 0.108 H 273.0°. Best body text is #FFFFFF at 15.59:1 contrast (WCAG AA passes).

Color values

HEX	#171C59
RGB	rgb(23, 28, 89)
HSL	hsl(235, 59%, 22%)
HSV	hsv(235, 74%, 35%)
CMYK	cmyk(74.2%, 68.5%, 0%, 65.1%)
CIE-LAB	lab(14.02, 20.69, -37.40)
CIE-LCH	lch(14.02, 42.74, 298.95°)
OKLab	oklab(26.72% 0.0056 -0.108)
OKLCH	oklch(26.72% 0.108 273)
XYZ	xyz(2.5712, 1.7337, 9.6484)
Luminance	0.0173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C59 #595417

analogous

#173D59 #171C59 #331759

triadic

#171C59 #59171C #1C5917

tetradic

#171C59 #59173D #595417 #175933

square

#171C59 #59173D #595417 #175933

split-complementary

#171C59 #593317 #3D5917

monochromatic

#060818 #0A0D28 #171C59 #242B8A #303BBA

Accessibility & contrast

On white

15.59

#171C59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171C59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C59

15.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C59	#FFFFFF	#000000	##FFFFFF
##171C59	1.00	15.59	1.35	15.59
#FFFFFF	15.59	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275B

Deuteranopia (green-blind)

#002158

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171c59;
/* rgb */ color: rgb(23, 28, 89);
/* oklch */ color: oklch(26.7% 0.108 273.0);

Tailwind

colors: {
  custom: {
    50: '#5e5889',
    500: '#171c59',
    950: '#000000',
  },
}

SCSS

$custom: #171c59;
$custom-light: #5e5889;
$custom-dark: #000000;

JSON

{
  "hex": "#171c59",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 89
  },
  "hsl": {
    "h": 235.455,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26715,
    "c": 0.1081,
    "h": 273
  },
  "luminance": 0.01734
}

Semantic roles & 50–950 ramp

primary

#171C59

secondary

#908A3C

accent

#D646E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171C59

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

Preview Lab → · Contrast checker → · Palette generator →