#634C52

CSS

:root {
  --dark-chocolate: #634c52;
  --dark-chocolate-rgb: 99 76 82;
  --dark-chocolate-oklch: oklch(0.443 0.032 1.2);
}

.element {
  color: var(--dark-chocolate);
  background-color: hsl(344 13% 34%);
  border-color: oklch(0.443 0.032 1.2);
}

Tailwind CSS v4

@theme {
  --color-dark-chocolate: #634c52;
  --color-dark-chocolate-50: #fef1f4;
  --color-dark-chocolate-100: #f2e4e7;
  --color-dark-chocolate-200: #e1cfd3;
  --color-dark-chocolate-300: #c7b1b6;
  --color-dark-chocolate-400: #b0979d;
  --color-dark-chocolate-500: #997e85;
  --color-dark-chocolate-600: #826a70;
  --color-dark-chocolate-700: #68555a;
  --color-dark-chocolate-800: #4c3e42;
  --color-dark-chocolate-900: #352b2e;
  --color-dark-chocolate-950: #20181a;
}

SCSS

$dark-chocolate: #634c52;
$dark-chocolate-rgb: 99, 76, 82;
$dark-chocolate-light: mix(#fff, $dark-chocolate, 20%);
$dark-chocolate-dark: mix(#000, $dark-chocolate, 20%);

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