#18378E#18378E

#18378E is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.149 H 264.9°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#18378E
RGB	rgb(24, 55, 142)
HSL	hsl(224, 71%, 33%)
HSV	hsv(224, 83%, 56%)
CMYK	cmyk(83.1%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(26.39, 23.06, -51.28)
CIE-LCH	lch(26.39, 56.23, 294.21°)
OKLab	oklab(37.4% -0.0133 -0.1483)
OKLCH	oklch(37.4% 0.149 264.9)
XYZ	xyz(6.6236, 4.8788, 26.1785)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18378E #8E6F18

analogous

#18728E #18378E #34188E

triadic

#18378E #8E1837 #378E18

tetradic

#18378E #8E1872 #8E6F18 #188E34

square

#18378E #8E1872 #8E6F18 #188E34

split-complementary

#18378E #8E3418 #728E18

monochromatic

#060E25 #0F235A #18378E #214BC2 #416BDF

Accessibility & contrast

On white

10.63

#18378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#18378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18378E

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18378E	#FFFFFF	#000000	##FFFFFF
##18378E	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004491

Deuteranopia (green-blind)

#00398C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #18378e;
/* rgb */ color: rgb(24, 55, 142);
/* oklch */ color: oklch(37.4% 0.149 264.9);

Tailwind

colors: {
  custom: {
    50: '#6b6db0',
    500: '#18378e',
    950: '#000000',
  },
}

SCSS

$custom: #18378e;
$custom-light: #6b6db0;
$custom-dark: #000000;

JSON

{
  "hex": "#18378e",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 224.237,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37396,
    "c": 0.14889,
    "h": 264.9
  },
  "luminance": 0.0488
}

Semantic roles & 50–950 ramp

primary

#18378E

secondary

#C09F42

accent

#BF3AEE

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #18378E

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

Preview Lab → · Contrast checker → · Palette generator →