#841100

CSS

:root {
  --indian-red: #841100;
  --indian-red-rgb: 132 17 0;
  --indian-red-oklch: oklch(0.393 0.15 31.7);
}

.element {
  color: var(--indian-red);
  background-color: hsl(8 100% 26%);
  border-color: oklch(0.393 0.15 31.7);
}

Tailwind CSS v4

@theme {
  --color-indian-red: #841100;
  --color-indian-red-50: #ffe7d9;
  --color-indian-red-100: #ffd7c7;
  --color-indian-red-200: #ffbdaa;
  --color-indian-red-300: #fa9a84;
  --color-indian-red-400: #e97965;
  --color-indian-red-500: #d75742;
  --color-indian-red-600: #b64b39;
  --color-indian-red-700: #923c2d;
  --color-indian-red-800: #6d2a21;
  --color-indian-red-900: #4d1c16;
  --color-indian-red-950: #320c07;
}

SCSS

$indian-red: #841100;
$indian-red-rgb: 132, 17, 0;
$indian-red-light: mix(#fff, $indian-red, 20%);
$indian-red-dark: mix(#000, $indian-red, 20%);

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