#D80C22

CSS

:root {
  --untamed-red: #d80c22;
  --untamed-red-rgb: 216 12 34;
  --untamed-red-oklch: oklch(0.558 0.223 25.7);
}

.element {
  color: var(--untamed-red);
  background-color: hsl(354 89% 45%);
  border-color: oklch(0.558 0.223 25.7);
}

Tailwind CSS v4

@theme {
  --color-untamed-red: #d80c22;
  --color-untamed-red-50: #ffddd2;
  --color-untamed-red-100: #ffcbbf;
  --color-untamed-red-200: #ffad9f;
  --color-untamed-red-300: #ff8475;
  --color-untamed-red-400: #ff5954;
  --color-untamed-red-500: #f7152a;
  --color-untamed-red-600: #d11a26;
  --color-untamed-red-700: #a8161e;
  --color-untamed-red-800: #7e0c18;
  --color-untamed-red-900: #59080f;
  --color-untamed-red-950: #3c0003;
}

SCSS

$untamed-red: #d80c22;
$untamed-red-rgb: 216, 12, 34;
$untamed-red-light: mix(#fff, $untamed-red, 20%);
$untamed-red-dark: mix(#000, $untamed-red, 20%);

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