#172579#172579

#172579 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.8% C 0.143 H 268.8°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#172579
RGB	rgb(23, 37, 121)
HSL	hsl(231, 68%, 28%)
HSV	hsv(231, 81%, 47%)
CMYK	cmyk(81%, 69.4%, 0%, 52.5%)
CIE-LAB	lab(19.58, 27.05, -49.24)
CIE-LCH	lch(19.58, 56.19, 298.78°)
OKLab	oklab(31.75% -0.0029 -0.1426)
OKLCH	oklch(31.75% 0.143 268.8)
XYZ	xyz(4.4649, 2.8853, 18.4070)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172579 #796B17

analogous

#175679 #172579 #3A1779

triadic

#172579 #791725 #257917

tetradic

#172579 #791756 #796B17 #17793A

square

#172579 #791756 #796B17 #17793A

split-complementary

#172579 #793A17 #567917

monochromatic

#05081A #0D1546 #172579 #2135AC #324AD8

Accessibility & contrast

On white

13.31

#172579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#172579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172579

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172579	#FFFFFF	#000000	##FFFFFF
##172579	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347C

Deuteranopia (green-blind)

#002B77

Tritanopia (blue-blind)

#003C4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172579;
/* rgb */ color: rgb(23, 37, 121);
/* oklch */ color: oklch(31.8% 0.143 268.8);

Tailwind

colors: {
  custom: {
    50: '#665fa1',
    500: '#172579',
    950: '#000000',
  },
}

SCSS

$custom: #172579;
$custom-light: #665fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#172579",
  "rgb": {
    "r": 23,
    "g": 37,
    "b": 121
  },
  "hsl": {
    "h": 231.429,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.31751,
    "c": 0.14259,
    "h": 268.8
  },
  "luminance": 0.02886
}

Semantic roles & 50–950 ramp

primary

#172579

secondary

#AE9E3E

accent

#D23DEB

background

#F6F5FA

surface

#EBE9F3

border

#C6C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #172579

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

Preview Lab → · Contrast checker → · Palette generator →