#171C78#171C78

#171C78 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.1% C 0.152 H 270.6°. Best body text is #FFFFFF at 14.25:1 contrast (WCAG AA passes).

Color values

HEX	#171C78
RGB	rgb(23, 28, 120)
HSL	hsl(237, 68%, 28%)
HSV	hsv(237, 81%, 47%)
CMYK	cmyk(80.8%, 76.7%, 0%, 52.9%)
CIE-LAB	lab(17.31, 32.59, -52.34)
CIE-LCH	lch(17.31, 61.65, 301.91°)
OKLab	oklab(30.09% 0.0017 -0.1516)
OKLCH	oklch(30.09% 0.152 270.6)
XYZ	xyz(4.1576, 2.3683, 18.0037)
Luminance	0.0237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C78 #787317

analogous

#174C78 #171C78 #421778

triadic

#171C78 #78171C #1C7817

tetradic

#171C78 #78174C #787317 #177842

square

#171C78 #78174C #787317 #177842

split-complementary

#171C78 #784217 #4C7817

monochromatic

#05061A #0D1045 #171C78 #2128AB #323AD8

Accessibility & contrast

On white

14.25

#171C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#171C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C78

14.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C78	#FFFFFF	#000000	##FFFFFF
##171C78	1.00	14.25	1.47	14.25
#FFFFFF	14.25	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7B

Deuteranopia (green-blind)

#002676

Tritanopia (blue-blind)

#003748

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171c78;
/* rgb */ color: rgb(23, 28, 120);
/* oklch */ color: oklch(30.1% 0.152 270.6);

Tailwind

colors: {
  custom: {
    50: '#6759a0',
    500: '#171c78',
    950: '#000000',
  },
}

SCSS

$custom: #171c78;
$custom-light: #6759a0;
$custom-dark: #000000;

JSON

{
  "hex": "#171c78",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 120
  },
  "hsl": {
    "h": 236.907,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.30085,
    "c": 0.15158,
    "h": 270.6
  },
  "luminance": 0.02369
}

Semantic roles & 50–950 ramp

primary

#171C78

secondary

#ADA73E

accent

#E23DEB

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171C78

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

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