#671B30

CSS

:root {
  --plum-cheese: #671b30;
  --plum-cheese-rgb: 103 27 48;
  --plum-cheese-oklch: oklch(0.353 0.109 8.2);
}

.element {
  color: var(--plum-cheese);
  background-color: hsl(343 58% 25%);
  border-color: oklch(0.353 0.109 8.2);
}

Tailwind CSS v4

@theme {
  --color-plum-cheese: #671b30;
  --color-plum-cheese-50: #ffe9ee;
  --color-plum-cheese-100: #ffdadf;
  --color-plum-cheese-200: #ffc2c9;
  --color-plum-cheese-300: #e9a0aa;
  --color-plum-cheese-400: #d58392;
  --color-plum-cheese-500: #c26578;
  --color-plum-cheese-600: #a45666;
  --color-plum-cheese-700: #844551;
  --color-plum-cheese-800: #61313c;
  --color-plum-cheese-900: #442129;
  --color-plum-cheese-950: #2c1017;
}

SCSS

$plum-cheese: #671b30;
$plum-cheese-rgb: 103, 27, 48;
$plum-cheese-light: mix(#fff, $plum-cheese, 20%);
$plum-cheese-dark: mix(#000, $plum-cheese, 20%);

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