#684249

CSS

:root {
  --plum-intended: #684249;
  --plum-intended-rgb: 104 66 73;
  --plum-intended-oklch: oklch(0.425 0.054 7.6);
}

.element {
  color: var(--plum-intended);
  background-color: hsl(349 22% 33%);
  border-color: oklch(0.425 0.054 7.6);
}

Tailwind CSS v4

@theme {
  --color-plum-intended: #684249;
  --color-plum-intended-50: #ffeff2;
  --color-plum-intended-100: #f9e1e4;
  --color-plum-intended-200: #eacbcf;
  --color-plum-intended-300: #d1adb1;
  --color-plum-intended-400: #bb9299;
  --color-plum-intended-500: #a67880;
  --color-plum-intended-600: #8c656c;
  --color-plum-intended-700: #705156;
  --color-plum-intended-800: #533b40;
  --color-plum-intended-900: #3a282c;
  --color-plum-intended-950: #241619;
}

SCSS

$plum-intended: #684249;
$plum-intended-rgb: 104, 66, 73;
$plum-intended-light: mix(#fff, $plum-intended, 20%);
$plum-intended-dark: mix(#000, $plum-intended, 20%);

.element {
  color: $plum-intended;
  box-shadow: 0 0 0 2px rgba($plum-intended, 0.35);
}