#6F1029

CSS

:root {
  --plum-cheese: #6f1029;
  --plum-cheese-rgb: 111 16 41;
  --plum-cheese-oklch: oklch(0.356 0.128 12.5);
}

.element {
  color: var(--plum-cheese);
  background-color: hsl(344 75% 25%);
  border-color: oklch(0.356 0.128 12.5);
}

Tailwind CSS v4

@theme {
  --color-plum-cheese: #6f1029;
  --color-plum-cheese-50: #ffe7ea;
  --color-plum-cheese-100: #ffd7db;
  --color-plum-cheese-200: #ffbec3;
  --color-plum-cheese-300: #f19ca3;
  --color-plum-cheese-400: #df7d8a;
  --color-plum-cheese-500: #cc5e6f;
  --color-plum-cheese-600: #ac505e;
  --color-plum-cheese-700: #8a404b;
  --color-plum-cheese-800: #672d38;
  --color-plum-cheese-900: #481f26;
  --color-plum-cheese-950: #2f0e14;
}

SCSS

$plum-cheese: #6f1029;
$plum-cheese-rgb: 111, 16, 41;
$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);
}