#6D372C

CSS

:root {
  --ebi-brown: #6d372c;
  --ebi-brown-rgb: 109 55 44;
  --ebi-brown-oklch: oklch(0.404 0.079 32.7);
}

.element {
  color: var(--ebi-brown);
  background-color: hsl(10 42% 30%);
  border-color: oklch(0.404 0.079 32.7);
}

Tailwind CSS v4

@theme {
  --color-ebi-brown: #6d372c;
  --color-ebi-brown-50: #ffeee6;
  --color-ebi-brown-100: #ffdfd6;
  --color-ebi-brown-200: #f4c9be;
  --color-ebi-brown-300: #dda99c;
  --color-ebi-brown-400: #c98d81;
  --color-ebi-brown-500: #b47264;
  --color-ebi-brown-600: #986155;
  --color-ebi-brown-700: #7a4d44;
  --color-ebi-brown-800: #5b3832;
  --color-ebi-brown-900: #402622;
  --color-ebi-brown-950: #281411;
}

SCSS

$ebi-brown: #6d372c;
$ebi-brown-rgb: 109, 55, 44;
$ebi-brown-light: mix(#fff, $ebi-brown, 20%);
$ebi-brown-dark: mix(#000, $ebi-brown, 20%);

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