#172C78#172C78

#172C78 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.0% C 0.132 H 266.8°. Best body text is #FFFFFF at 12.59:1 contrast (WCAG AA passes).

Color values

HEX	#172C78
RGB	rgb(23, 44, 120)
HSL	hsl(227, 68%, 28%)
HSV	hsv(227, 81%, 47%)
CMYK	cmyk(80.8%, 63.3%, 0%, 52.9%)
CIE-LAB	lab(21.35, 21.77, -45.70)
CIE-LCH	lch(21.35, 50.62, 295.47°)
OKLab	oklab(33.03% -0.0073 -0.1321)
OKLCH	oklch(33.03% 0.132 266.8)
XYZ	xyz(4.6430, 3.3391, 18.1655)
Luminance	0.0334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C78 #786317

analogous

#175C78 #172C78 #321778

triadic

#172C78 #78172C #2C7817

tetradic

#172C78 #78175C #786317 #177832

square

#172C78 #78175C #786317 #177832

split-complementary

#172C78 #783217 #5C7817

monochromatic

#05091A #0D1945 #172C78 #213FAB #3256D8

Accessibility & contrast

On white

12.59

#172C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#172C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C78

12.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C78	#FFFFFF	#000000	##FFFFFF
##172C78	1.00	12.59	1.67	12.59
#FFFFFF	12.59	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387B

Deuteranopia (green-blind)

#002F77

Tritanopia (blue-blind)

#00404D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #172c78;
/* rgb */ color: rgb(23, 44, 120);
/* oklch */ color: oklch(33.0% 0.132 266.8);

Tailwind

colors: {
  custom: {
    50: '#6564a0',
    500: '#172c78',
    950: '#000000',
  },
}

SCSS

$custom: #172c78;
$custom-light: #6564a0;
$custom-dark: #000000;

JSON

{
  "hex": "#172c78",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 120
  },
  "hsl": {
    "h": 227.01,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.3303,
    "c": 0.13231,
    "h": 266.8
  },
  "luminance": 0.0334
}

Semantic roles & 50–950 ramp

primary

#172C78

secondary

#AD953E

accent

#C53DEB

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07050F

muted

#7A7A7E

Preview Lab

Preview with #172C78

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

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