#171B79#171B79

#171B79 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.154 H 270.7°. Best body text is #FFFFFF at 14.29:1 contrast (WCAG AA passes).

Color values

HEX	#171B79
RGB	rgb(23, 27, 121)
HSL	hsl(238, 68%, 28%)
HSV	hsv(238, 81%, 47%)
CMYK	cmyk(81%, 77.7%, 0%, 52.5%)
CIE-LAB	lab(17.21, 33.57, -53.15)
CIE-LCH	lch(17.21, 62.87, 302.27°)
OKLab	oklab(30.04% 0.0019 -0.1539)
OKLCH	oklch(30.04% 0.154 270.7)
XYZ	xyz(4.1953, 2.3460, 18.3172)
Luminance	0.0235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B79 #797517

analogous

#174C79 #171B79 #441779

triadic

#171B79 #79171B #1B7917

tetradic

#171B79 #79174C #797517 #177944

square

#171B79 #79174C #797517 #177944

split-complementary

#171B79 #794417 #4C7917

monochromatic

#05061A #0D1046 #171B79 #2126AC #3239D8

Accessibility & contrast

On white

14.29

#171B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#171B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B79

14.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B79	#FFFFFF	#000000	##FFFFFF
##171B79	1.00	14.29	1.47	14.29
#FFFFFF	14.29	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7C

Deuteranopia (green-blind)

#002577

Tritanopia (blue-blind)

#003749

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171b79;
/* rgb */ color: rgb(23, 27, 121);
/* oklch */ color: oklch(30.0% 0.154 270.7);

Tailwind

colors: {
  custom: {
    50: '#6758a1',
    500: '#171b79',
    950: '#000000',
  },
}

SCSS

$custom: #171b79;
$custom-light: #6758a1;
$custom-dark: #000000;

JSON

{
  "hex": "#171b79",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 121
  },
  "hsl": {
    "h": 237.551,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.30044,
    "c": 0.15393,
    "h": 270.7
  },
  "luminance": 0.02347
}

Semantic roles & 50–950 ramp

primary

#171B79

secondary

#AEA93E

accent

#E43DEB

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #171B79

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

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