#422527

CSS

:root {
  --dark-roast: #422527;
  --dark-roast-rgb: 66 37 39;
  --dark-roast-oklch: oklch(0.303 0.044 15.6);
}

.element {
  color: var(--dark-roast);
  background-color: hsl(356 28% 20%);
  border-color: oklch(0.303 0.044 15.6);
}

Tailwind CSS v4

@theme {
  --color-dark-roast: #422527;
  --color-dark-roast-50: #fff0f0;
  --color-dark-roast-100: #f6e2e2;
  --color-dark-roast-200: #e7cdcd;
  --color-dark-roast-300: #cdafaf;
  --color-dark-roast-400: #b79496;
  --color-dark-roast-500: #a17b7c;
  --color-dark-roast-600: #886869;
  --color-dark-roast-700: #6d5354;
  --color-dark-roast-800: #513c3e;
  --color-dark-roast-900: #38292a;
  --color-dark-roast-950: #231718;
}

SCSS

$dark-roast: #422527;
$dark-roast-rgb: 66, 37, 39;
$dark-roast-light: mix(#fff, $dark-roast, 20%);
$dark-roast-dark: mix(#000, $dark-roast, 20%);

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