#171E51#171E51

#171E51 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.093 H 272.4°. Best body text is #FFFFFF at 15.66:1 contrast (WCAG AA passes).

Color values

HEX	#171E51
RGB	rgb(23, 30, 81)
HSL	hsl(233, 56%, 20%)
HSV	hsv(233, 72%, 32%)
CMYK	cmyk(71.6%, 63%, 0%, 68.2%)
CIE-LAB	lab(13.85, 15.99, -32.26)
CIE-LCH	lch(13.85, 36.01, 296.36°)
OKLab	oklab(26.36% 0.0039 -0.0928)
OKLCH	oklch(26.36% 0.093 272.4)
XYZ	xyz(2.3023, 1.7046, 7.9907)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.13

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E51 #514A17

analogous

#173B51 #171E51 #2D1751

triadic

#171E51 #51171E #1E5117

tetradic

#171E51 #51173B #514A17 #17512D

square

#171E51 #51173B #514A17 #17512D

split-complementary

#171E51 #512D17 #3B5117

monochromatic

#070918 #090C21 #171E51 #253081 #3241B0

Accessibility & contrast

On white

15.66

#171E51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171E51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E51

15.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E51	#FFFFFF	#000000	##FFFFFF
##171E51	1.00	15.66	1.34	15.66
#FFFFFF	15.66	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002653

Deuteranopia (green-blind)

#002150

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171e51;
/* rgb */ color: rgb(23, 30, 81);
/* oklch */ color: oklch(26.4% 0.093 272.4);

Tailwind

colors: {
  custom: {
    50: '#5c5982',
    500: '#171e51',
    950: '#000000',
  },
}

SCSS

$custom: #171e51;
$custom-light: #5c5982;
$custom-dark: #000000;

JSON

{
  "hex": "#171e51",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 81
  },
  "hsl": {
    "h": 232.759,
    "s": 55.769,
    "l": 20.392
  },
  "oklch": {
    "l": 0.2636,
    "c": 0.09292,
    "h": 272.4
  },
  "luminance": 0.01705
}

Semantic roles & 50–950 ramp

primary

#171E51

secondary

#887F3C

accent

#CD49DF

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030A

muted

#79787C

Preview Lab

Preview with #171E51

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

Preview Lab → · Contrast checker → · Palette generator →