#172F78#172F78

#172F78 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 33.7% C 0.128 H 265.8°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#172F78
RGB	rgb(23, 47, 120)
HSL	hsl(225, 68%, 28%)
HSV	hsv(225, 81%, 47%)
CMYK	cmyk(80.8%, 60.8%, 0%, 52.9%)
CIE-LAB	lab(22.20, 19.64, -44.32)
CIE-LCH	lch(22.20, 48.48, 293.90°)
OKLab	oklab(33.66% -0.0094 -0.128)
OKLCH	oklch(33.66% 0.128 265.8)
XYZ	xyz(4.7588, 3.5707, 18.2041)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F78 #786017

analogous

#175F78 #172F78 #301778

triadic

#172F78 #78172F #2F7817

tetradic

#172F78 #78175F #786017 #177830

square

#172F78 #78175F #786017 #177830

split-complementary

#172F78 #783017 #5F7817

monochromatic

#050A1A #0D1B45 #172F78 #2143AB #325BD8

Accessibility & contrast

On white

12.25

#172F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#172F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F78

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F78	#FFFFFF	#000000	##FFFFFF
##172F78	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A7A

Deuteranopia (green-blind)

#003177

Tritanopia (blue-blind)

#00414E

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172f78;
/* rgb */ color: rgb(23, 47, 120);
/* oklch */ color: oklch(33.7% 0.128 265.8);

Tailwind

colors: {
  custom: {
    50: '#6567a0',
    500: '#172f78',
    950: '#000000',
  },
}

SCSS

$custom: #172f78;
$custom-light: #6567a0;
$custom-dark: #000000;

JSON

{
  "hex": "#172f78",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 120
  },
  "hsl": {
    "h": 225.155,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.3366,
    "c": 0.12836,
    "h": 265.8
  },
  "luminance": 0.03571
}

Semantic roles & 50–950 ramp

primary

#172F78

secondary

#AD923E

accent

#C03DEB

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060F

muted

#7A7A7E

Preview Lab

Preview with #172F78

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

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