#171C58#171C58

#171C58 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.107 H 273.0°. Best body text is #FFFFFF at 15.63:1 contrast (WCAG AA passes).

Color values

HEX	#171C58
RGB	rgb(23, 28, 88)
HSL	hsl(235, 59%, 22%)
HSV	hsv(235, 74%, 35%)
CMYK	cmyk(73.9%, 68.2%, 0%, 65.5%)
CIE-LAB	lab(13.93, 20.29, -36.89)
CIE-LCH	lch(13.93, 42.10, 298.81°)
OKLab	oklab(26.62% 0.0056 -0.1064)
OKLCH	oklch(26.62% 0.107 273)
XYZ	xyz(2.5295, 1.7170, 9.4287)
Luminance	0.0172 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C58 #585317

analogous

#173D58 #171C58 #331758

triadic

#171C58 #58171C #1C5817

tetradic

#171C58 #58173D #585317 #175833

square

#171C58 #58173D #585317 #175833

split-complementary

#171C58 #583317 #3D5817

monochromatic

#060818 #0A0D27 #171C58 #242B89 #303BB9

Accessibility & contrast

On white

15.63

#171C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C58

15.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C58	#FFFFFF	#000000	##FFFFFF
##171C58	1.00	15.63	1.34	15.63
#FFFFFF	15.63	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265A

Deuteranopia (green-blind)

#002157

Tritanopia (blue-blind)

#002B37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171c58;
/* rgb */ color: rgb(23, 28, 88);
/* oklch */ color: oklch(26.6% 0.107 273.0);

Tailwind

colors: {
  custom: {
    50: '#5e5888',
    500: '#171c58',
    950: '#000000',
  },
}

SCSS

$custom: #171c58;
$custom-light: #5e5888;
$custom-dark: #000000;

JSON

{
  "hex": "#171c58",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 88
  },
  "hsl": {
    "h": 235.385,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.26615,
    "c": 0.1066,
    "h": 273
  },
  "luminance": 0.01717
}

Semantic roles & 50–950 ramp

primary

#171C58

secondary

#8F893C

accent

#D646E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171C58

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

Preview Lab → · Contrast checker → · Palette generator →