#AD634A

CSS

:root {
  --red-cent: #ad634a;
  --red-cent-rgb: 173 99 74;
  --red-cent-oklch: oklch(0.578 0.103 39.3);
}

.element {
  color: var(--red-cent);
  background-color: hsl(15 40% 48%);
  border-color: oklch(0.578 0.103 39.3);
}

Tailwind CSS v4

@theme {
  --color-red-cent: #ad634a;
  --color-red-cent-50: #ffecdf;
  --color-red-cent-100: #ffddce;
  --color-red-cent-200: #fcc6b3;
  --color-red-cent-300: #e6a68f;
  --color-red-cent-400: #d38970;
  --color-red-cent-500: #bf6d51;
  --color-red-cent-600: #a25c45;
  --color-red-cent-700: #824a37;
  --color-red-cent-800: #613528;
  --color-red-cent-900: #44241b;
  --color-red-cent-950: #2c130b;
}

SCSS

$red-cent: #ad634a;
$red-cent-rgb: 173, 99, 74;
$red-cent-light: mix(#fff, $red-cent, 20%);
$red-cent-dark: mix(#000, $red-cent, 20%);

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