#171D78#171D78

#171D78 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.2% C 0.150 H 270.5°. Best body text is #FFFFFF at 14.16:1 contrast (WCAG AA passes).

Color values

HEX	#171D78
RGB	rgb(23, 29, 120)
HSL	hsl(236, 68%, 28%)
HSV	hsv(236, 81%, 47%)
CMYK	cmyk(80.8%, 75.8%, 0%, 52.9%)
CIE-LAB	lab(17.54, 31.96, -51.97)
CIE-LCH	lch(17.54, 61.01, 301.59°)
OKLab	oklab(30.25% 0.0012 -0.1505)
OKLCH	oklch(30.25% 0.151 270.5)
XYZ	xyz(4.1817, 2.4165, 18.0117)
Luminance	0.0242 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D78 #787217

analogous

#174D78 #171D78 #421778

triadic

#171D78 #78171D #1D7817

tetradic

#171D78 #78174D #787217 #177842

square

#171D78 #78174D #787217 #177842

split-complementary

#171D78 #784217 #4D7817

monochromatic

#05061A #0D1145 #171D78 #2129AB #323CD8

Accessibility & contrast

On white

14.16

#171D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D78

14.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D78	#FFFFFF	#000000	##FFFFFF
##171D78	1.00	14.16	1.48	14.16
#FFFFFF	14.16	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307B

Deuteranopia (green-blind)

#002676

Tritanopia (blue-blind)

#003748

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171d78;
/* rgb */ color: rgb(23, 29, 120);
/* oklch */ color: oklch(30.2% 0.150 270.5);

Tailwind

colors: {
  custom: {
    50: '#675aa0',
    500: '#171d78',
    950: '#000000',
  },
}

SCSS

$custom: #171d78;
$custom-light: #675aa0;
$custom-dark: #000000;

JSON

{
  "hex": "#171d78",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 120
  },
  "hsl": {
    "h": 236.289,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.30245,
    "c": 0.1505,
    "h": 270.5
  },
  "luminance": 0.02417
}

Semantic roles & 50–950 ramp

primary

#171D78

secondary

#ADA63E

accent

#E03DEB

background

#F6F5FA

surface

#EBE9F3

border

#C6C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171D78

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

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