#171D79#171D79

#171D79 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.152 H 270.4°. Best body text is #FFFFFF at 14.11:1 contrast (WCAG AA passes).

Color values

HEX	#171D79
RGB	rgb(23, 29, 121)
HSL	hsl(236, 68%, 28%)
HSV	hsv(236, 81%, 47%)
CMYK	cmyk(81%, 76%, 0%, 52.5%)
CIE-LAB	lab(17.65, 32.33, -52.42)
CIE-LCH	lch(17.65, 61.59, 301.66°)
OKLab	oklab(30.36% 0.0011 -0.1518)
OKLCH	oklch(30.36% 0.152 270.4)
XYZ	xyz(4.2427, 2.4409, 18.3330)
Luminance	0.0244 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D79 #797317

analogous

#174E79 #171D79 #421779

triadic

#171D79 #79171D #1D7917

tetradic

#171D79 #79174E #797317 #177942

square

#171D79 #79174E #797317 #177942

split-complementary

#171D79 #794217 #4E7917

monochromatic

#05061A #0D1146 #171D79 #2129AC #323CD8

Accessibility & contrast

On white

14.11

#171D79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#171D79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D79

14.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D79	#FFFFFF	#000000	##FFFFFF
##171D79	1.00	14.11	1.49	14.11
#FFFFFF	14.11	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307C

Deuteranopia (green-blind)

#002677

Tritanopia (blue-blind)

#003849

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171d79;
/* rgb */ color: rgb(23, 29, 121);
/* oklch */ color: oklch(30.4% 0.152 270.4);

Tailwind

colors: {
  custom: {
    50: '#675aa1',
    500: '#171d79',
    950: '#000000',
  },
}

SCSS

$custom: #171d79;
$custom-light: #675aa1;
$custom-dark: #000000;

JSON

{
  "hex": "#171d79",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 121
  },
  "hsl": {
    "h": 236.327,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.30359,
    "c": 0.15182,
    "h": 270.4
  },
  "luminance": 0.02441
}

Semantic roles & 50–950 ramp

primary

#171D79

secondary

#AEA73E

accent

#E03DEB

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171D79

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

Preview Lab → · Contrast checker → · Palette generator →