#172B78#172B78

#172B78 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 32.8% C 0.134 H 267.2°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#172B78
RGB	rgb(23, 43, 120)
HSL	hsl(228, 68%, 28%)
HSV	hsv(228, 81%, 47%)
CMYK	cmyk(80.8%, 64.2%, 0%, 52.9%)
CIE-LAB	lab(21.08, 22.48, -46.15)
CIE-LCH	lch(21.08, 51.33, 295.97°)
OKLab	oklab(32.82% -0.0066 -0.1334)
OKLCH	oklch(32.82% 0.134 267.2)
XYZ	xyz(4.6062, 3.2655, 18.1532)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B78 #786417

analogous

#175B78 #172B78 #331778

triadic

#172B78 #78172B #2B7817

tetradic

#172B78 #78175B #786417 #177833

square

#172B78 #78175B #786417 #177833

split-complementary

#172B78 #783317 #5B7817

monochromatic

#05091A #0D1945 #172B78 #213DAB #3254D8

Accessibility & contrast

On white

12.70

#172B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#172B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B78

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B78	#FFFFFF	#000000	##FFFFFF
##172B78	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377B

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003F4D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #172b78;
/* rgb */ color: rgb(23, 43, 120);
/* oklch */ color: oklch(32.8% 0.134 267.2);

Tailwind

colors: {
  custom: {
    50: '#6664a0',
    500: '#172b78',
    950: '#000000',
  },
}

SCSS

$custom: #172b78;
$custom-light: #6664a0;
$custom-dark: #000000;

JSON

{
  "hex": "#172b78",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 120
  },
  "hsl": {
    "h": 227.629,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.32824,
    "c": 0.1336,
    "h": 267.2
  },
  "luminance": 0.03266
}

Semantic roles & 50–950 ramp

primary

#172B78

secondary

#AD963E

accent

#C73DEB

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050F

muted

#7A797E

Preview Lab

Preview with #172B78

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

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