#18378B#18378B

#18378B is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.145 H 264.7°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#18378B
RGB	rgb(24, 55, 139)
HSL	hsl(224, 71%, 32%)
HSV	hsv(224, 83%, 55%)
CMYK	cmyk(82.7%, 60.4%, 0%, 45.5%)
CIE-LAB	lab(26.13, 21.85, -49.85)
CIE-LCH	lch(26.13, 54.42, 293.67°)
OKLab	oklab(37.12% -0.0134 -0.1441)
OKLCH	oklch(37.12% 0.145 264.7)
XYZ	xyz(6.4014, 4.7899, 25.0082)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18378B #8B6C18

analogous

#18718B #18378B #33188B

triadic

#18378B #8B1837 #378B18

tetradic

#18378B #8B1871 #8B6C18 #188B33

square

#18378B #8B1871 #8B6C18 #188B33

split-complementary

#18378B #8B3318 #718B18

monochromatic

#060E23 #0F2257 #18378B #214CBF #3F6ADE

Accessibility & contrast

On white

10.72

#18378B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#18378B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18378B

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18378B	#FFFFFF	#000000	##FFFFFF
##18378B	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438E

Deuteranopia (green-blind)

#003989

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #18378b;
/* rgb */ color: rgb(24, 55, 139);
/* oklch */ color: oklch(37.1% 0.145 264.7);

Tailwind

colors: {
  custom: {
    50: '#6a6dae',
    500: '#18378b',
    950: '#000000',
  },
}

SCSS

$custom: #18378b;
$custom-light: #6a6dae;
$custom-dark: #000000;

JSON

{
  "hex": "#18378b",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 139
  },
  "hsl": {
    "h": 223.826,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.37122,
    "c": 0.14471,
    "h": 264.7
  },
  "luminance": 0.04791
}

Semantic roles & 50–950 ramp

primary

#18378B

secondary

#BE9C40

accent

#BD3AED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #18378B

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

Preview Lab → · Contrast checker → · Palette generator →