Oxford Brown

CSS

:root {
  --oxford-brown: #504139;
  --oxford-brown-rgb: 80 65 57;
  --oxford-brown-oklch: oklch(0.389 0.025 49.7);
}

.element {
  color: var(--oxford-brown);
  background-color: hsl(21 17% 27%);
  border-color: oklch(0.389 0.025 49.7);
}

Tailwind CSS v4

@theme {
  --color-oxford-brown: #504139;
  --color-oxford-brown-50: #fbf3ef;
  --color-oxford-brown-100: #efe6e0;
  --color-oxford-brown-200: #ddd2cb;
  --color-oxford-brown-300: #c2b4ac;
  --color-oxford-brown-400: #ab9b92;
  --color-oxford-brown-500: #948278;
  --color-oxford-brown-600: #7e6e66;
  --color-oxford-brown-700: #645851;
  --color-oxford-brown-800: #4a403b;
  --color-oxford-brown-900: #332c29;
  --color-oxford-brown-950: #1f1916;
}

SCSS

$oxford-brown: #504139;
$oxford-brown-rgb: 80, 65, 57;
$oxford-brown-light: mix(#fff, $oxford-brown, 20%);
$oxford-brown-dark: mix(#000, $oxford-brown, 20%);

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