#171E53#171E53

#171E53 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.096 H 272.4°. Best body text is #FFFFFF at 15.59:1 contrast (WCAG AA passes).

Color values

HEX	#171E53
RGB	rgb(23, 30, 83)
HSL	hsl(233, 57%, 21%)
HSV	hsv(233, 72%, 33%)
CMYK	cmyk(72.3%, 63.9%, 0%, 67.5%)
CIE-LAB	lab(14.03, 16.81, -33.34)
CIE-LCH	lch(14.03, 37.33, 296.75°)
OKLab	oklab(26.55% 0.004 -0.096)
OKLCH	oklch(26.55% 0.096 272.4)
XYZ	xyz(2.3784, 1.7350, 8.3915)
Luminance	0.0174 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E53 #534C17

analogous

#173C53 #171E53 #2E1753

triadic

#171E53 #53171E #1E5317

tetradic

#171E53 #53173C #534C17 #17532E

square

#171E53 #53173C #534C17 #17532E

split-complementary

#171E53 #532E17 #3C5317

monochromatic

#070918 #0A0D23 #171E53 #242F83 #3241B3

Accessibility & contrast

On white

15.59

#171E53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171E53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E53

15.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E53	#FFFFFF	#000000	##FFFFFF
##171E53	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)

#002655

Deuteranopia (green-blind)

#002152

Tritanopia (blue-blind)

#002B35

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171e53;
/* rgb */ color: rgb(23, 30, 83);
/* oklch */ color: oklch(26.5% 0.096 272.4);

Tailwind

colors: {
  custom: {
    50: '#5d5984',
    500: '#171e53',
    950: '#000000',
  },
}

SCSS

$custom: #171e53;
$custom-light: #5d5984;
$custom-dark: #000000;

JSON

{
  "hex": "#171e53",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 83
  },
  "hsl": {
    "h": 233,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.26547,
    "c": 0.09608,
    "h": 272.4
  },
  "luminance": 0.01735
}

Semantic roles & 50–950 ramp

primary

#171E53

secondary

#8A813C

accent

#CE48E0

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171E53

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

Preview Lab → · Contrast checker → · Palette generator →