#3A2409

CSS

:root {
  --medium-roast: #3a2409;
  --medium-roast-rgb: 58 36 9;
  --medium-roast-oklch: oklch(0.282 0.052 68.1);
}

.element {
  color: var(--medium-roast);
  background-color: hsl(33 73% 13%);
  border-color: oklch(0.282 0.052 68.1);
}

Tailwind CSS v4

@theme {
  --color-medium-roast: #3a2409;
  --color-medium-roast-50: #fff3e6;
  --color-medium-roast-100: #f3e5d6;
  --color-medium-roast-200: #e3d1bd;
  --color-medium-roast-300: #c9b39b;
  --color-medium-roast-400: #b3997e;
  --color-medium-roast-500: #9d8061;
  --color-medium-roast-600: #856d53;
  --color-medium-roast-700: #6b5742;
  --color-medium-roast-800: #4f3f2f;
  --color-medium-roast-900: #372b20;
  --color-medium-roast-950: #221910;
}

SCSS

$medium-roast: #3a2409;
$medium-roast-rgb: 58, 36, 9;
$medium-roast-light: mix(#fff, $medium-roast, 20%);
$medium-roast-dark: mix(#000, $medium-roast, 20%);

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