#171D53#171D53

#171D53 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.3% C 0.098 H 272.9°. Best body text is #FFFFFF at 15.71:1 contrast (WCAG AA passes).

Color values

HEX	#171D53
RGB	rgb(23, 29, 83)
HSL	hsl(234, 57%, 21%)
HSV	hsv(234, 72%, 33%)
CMYK	cmyk(72.3%, 65.1%, 0%, 67.5%)
CIE-LAB	lab(13.74, 17.54, -33.81)
CIE-LCH	lch(13.74, 38.09, 297.43°)
OKLab	oklab(26.33% 0.0049 -0.0974)
OKLCH	oklch(26.33% 0.098 272.9)
XYZ	xyz(2.3535, 1.6852, 8.3832)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D53 #534D17

analogous

#173B53 #171D53 #2F1753

triadic

#171D53 #53171D #1D5317

tetradic

#171D53 #53173B #534D17 #17532F

square

#171D53 #53173B #534D17 #17532F

split-complementary

#171D53 #532F17 #3B5317

monochromatic

#070818 #0A0C23 #171D53 #242E83 #323EB3

Accessibility & contrast

On white

15.71

#171D53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#171D53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D53

15.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D53	#FFFFFF	#000000	##FFFFFF
##171D53	1.00	15.71	1.34	15.71
#FFFFFF	15.71	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002655

Deuteranopia (green-blind)

#002052

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #171d53;
/* rgb */ color: rgb(23, 29, 83);
/* oklch */ color: oklch(26.3% 0.098 272.9);

Tailwind

colors: {
  custom: {
    50: '#5d5884',
    500: '#171d53',
    950: '#000000',
  },
}

SCSS

$custom: #171d53;
$custom-light: #5d5884;
$custom-dark: #000000;

JSON

{
  "hex": "#171d53",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 83
  },
  "hsl": {
    "h": 234,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.26332,
    "c": 0.09752,
    "h": 272.9
  },
  "luminance": 0.01685
}

Semantic roles & 50–950 ramp

primary

#171D53

secondary

#8A823C

accent

#D148E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171D53

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

Preview Lab → · Contrast checker → · Palette generator →