#172378#172378

#172378 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.3% C 0.144 H 269.3°. Best body text is #FFFFFF at 13.57:1 contrast (WCAG AA passes).

Color values

HEX	#172378
RGB	rgb(23, 35, 120)
HSL	hsl(233, 68%, 28%)
HSV	hsv(233, 81%, 47%)
CMYK	cmyk(80.8%, 70.8%, 0%, 52.9%)
CIE-LAB	lab(18.97, 28.03, -49.61)
CIE-LCH	lch(18.97, 56.97, 299.46°)
OKLab	oklab(31.28% -0.0018 -0.1436)
OKLCH	oklch(31.28% 0.144 269.3)
XYZ	xyz(4.3434, 2.7398, 18.0656)
Luminance	0.0274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172378 #786C17

analogous

#175378 #172378 #3B1778

triadic

#172378 #781723 #237817

tetradic

#172378 #781753 #786C17 #17783B

square

#172378 #781753 #786C17 #17783B

split-complementary

#172378 #783B17 #537817

monochromatic

#05071A #0D1445 #172378 #2132AB #3246D8

Accessibility & contrast

On white

13.57

#172378 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#172378 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172378

13.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172378	#FFFFFF	#000000	##FFFFFF
##172378	1.00	13.57	1.55	13.57
#FFFFFF	13.57	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337B

Deuteranopia (green-blind)

#002976

Tritanopia (blue-blind)

#003A4A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172378;
/* rgb */ color: rgb(23, 35, 120);
/* oklch */ color: oklch(31.3% 0.144 269.3);

Tailwind

colors: {
  custom: {
    50: '#665ea0',
    500: '#172378',
    950: '#000000',
  },
}

SCSS

$custom: #172378;
$custom-light: #665ea0;
$custom-dark: #000000;

JSON

{
  "hex": "#172378",
  "rgb": {
    "r": 23,
    "g": 35,
    "b": 120
  },
  "hsl": {
    "h": 232.577,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.31278,
    "c": 0.14363,
    "h": 269.3
  },
  "luminance": 0.0274
}

Semantic roles & 50–950 ramp

primary

#172378

secondary

#AD9F3E

accent

#D53DEB

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #172378

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

Preview Lab → · Contrast checker → · Palette generator →