#172D79#172D79

#172D79 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.3% C 0.132 H 266.5°. Best body text is #FFFFFF at 12.44:1 contrast (WCAG AA passes).

Color values

HEX	#172D79
RGB	rgb(23, 45, 121)
HSL	hsl(227, 68%, 28%)
HSV	hsv(227, 81%, 47%)
CMYK	cmyk(81%, 62.8%, 0%, 52.5%)
CIE-LAB	lab(21.72, 21.47, -45.73)
CIE-LCH	lch(21.72, 50.52, 295.15°)
OKLab	oklab(33.33% -0.008 -0.1322)
OKLCH	oklch(33.33% 0.132 266.5)
XYZ	xyz(4.7417, 3.4389, 18.4993)
Luminance	0.0344 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D79 #796317

analogous

#175E79 #172D79 #321779

triadic

#172D79 #79172D #2D7917

tetradic

#172D79 #79175E #796317 #177932

square

#172D79 #79175E #796317 #177932

split-complementary

#172D79 #793217 #5E7917

monochromatic

#050A1A #0D1A46 #172D79 #2140AC #3258D8

Accessibility & contrast

On white

12.44

#172D79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#172D79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D79

12.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D79	#FFFFFF	#000000	##FFFFFF
##172D79	1.00	12.44	1.69	12.44
#FFFFFF	12.44	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00397C

Deuteranopia (green-blind)

#003078

Tritanopia (blue-blind)

#00404E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172d79;
/* rgb */ color: rgb(23, 45, 121);
/* oklch */ color: oklch(33.3% 0.132 266.5);

Tailwind

colors: {
  custom: {
    50: '#6665a0',
    500: '#172d79',
    950: '#000000',
  },
}

SCSS

$custom: #172d79;
$custom-light: #6665a0;
$custom-dark: #000000;

JSON

{
  "hex": "#172d79",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 121
  },
  "hsl": {
    "h": 226.531,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.33332,
    "c": 0.13243,
    "h": 266.5
  },
  "luminance": 0.03439
}

Semantic roles & 50–950 ramp

primary

#172D79

secondary

#AE953E

accent

#C43DEB

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07050F

muted

#7A7A7E

Preview Lab

Preview with #172D79

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

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