#A9654B

CSS

:root {
  --red-cent: #a9654b;
  --red-cent-rgb: 169 101 75;
  --red-cent-oklch: oklch(0.577 0.096 41.5);
}

.element {
  color: var(--red-cent);
  background-color: hsl(17 39% 48%);
  border-color: oklch(0.577 0.096 41.5);
}

Tailwind CSS v4

@theme {
  --color-red-cent: #a9654b;
  --color-red-cent-50: #ffeddf;
  --color-red-cent-100: #ffdecf;
  --color-red-cent-200: #f9c8b4;
  --color-red-cent-300: #e2a890;
  --color-red-cent-400: #cf8b72;
  --color-red-cent-500: #bb6f52;
  --color-red-cent-600: #9e5f46;
  --color-red-cent-700: #7f4b38;
  --color-red-cent-800: #5f3628;
  --color-red-cent-900: #42251b;
  --color-red-cent-950: #2a130c;
}

SCSS

$red-cent: #a9654b;
$red-cent-rgb: 169, 101, 75;
$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);
}