#A33330

CSS

:root {
  --raging-raisin: #a33330;
  --raging-raisin-rgb: 163 51 48;
  --raging-raisin-oklch: oklch(0.487 0.148 25.8);
}

.element {
  color: var(--raging-raisin);
  background-color: hsl(2 55% 41%);
  border-color: oklch(0.487 0.148 25.8);
}

Tailwind CSS v4

@theme {
  --color-raging-raisin: #a33330;
  --color-raging-raisin-50: #ffe6de;
  --color-raging-raisin-100: #ffd6cd;
  --color-raging-raisin-200: #ffbcb1;
  --color-raging-raisin-300: #fa998d;
  --color-raging-raisin-400: #e97870;
  --color-raging-raisin-500: #d75650;
  --color-raging-raisin-600: #b54a44;
  --color-raging-raisin-700: #923b36;
  --color-raging-raisin-800: #6d2a28;
  --color-raging-raisin-900: #4d1c1b;
  --color-raging-raisin-950: #320b0b;
}

SCSS

$raging-raisin: #a33330;
$raging-raisin-rgb: 163, 51, 48;
$raging-raisin-light: mix(#fff, $raging-raisin, 20%);
$raging-raisin-dark: mix(#000, $raging-raisin, 20%);

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