#633E43

CSS

:root {
  --red-rumour: #633e43;
  --red-rumour-rgb: 99 62 67;
  --red-rumour-oklch: oklch(0.409 0.052 10.8);
}

.element {
  color: var(--red-rumour);
  background-color: hsl(352 23% 32%);
  border-color: oklch(0.409 0.052 10.8);
}

Tailwind CSS v4

@theme {
  --color-red-rumour: #633e43;
  --color-red-rumour-50: #ffeff1;
  --color-red-rumour-100: #f9e1e3;
  --color-red-rumour-200: #eaccce;
  --color-red-rumour-300: #d1adb0;
  --color-red-rumour-400: #bb9297;
  --color-red-rumour-500: #a6787e;
  --color-red-rumour-600: #8c666a;
  --color-red-rumour-700: #705155;
  --color-red-rumour-800: #533b3f;
  --color-red-rumour-900: #3a282b;
  --color-red-rumour-950: #241618;
}

SCSS

$red-rumour: #633e43;
$red-rumour-rgb: 99, 62, 67;
$red-rumour-light: mix(#fff, $red-rumour, 20%);
$red-rumour-dark: mix(#000, $red-rumour, 20%);

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