Rust

CSS

:root {
  --rust: #a83c09;
  --rust-rgb: 168 60 9;
  --rust-oklch: oklch(0.503 0.152 40.3);
}

.element {
  color: var(--rust);
  background-color: hsl(19 90% 35%);
  border-color: oklch(0.503 0.152 40.3);
}

Tailwind CSS v4

@theme {
  --color-rust: #a83c09;
  --color-rust-50: #ffe8d3;
  --color-rust-100: #ffd8c0;
  --color-rust-200: #ffbfa1;
  --color-rust-300: #f99c78;
  --color-rust-400: #e87c55;
  --color-rust-500: #d65b2a;
  --color-rust-600: #b54e25;
  --color-rust-700: #913e1e;
  --color-rust-800: #6d2b16;
  --color-rust-900: #4d1d0e;
  --color-rust-950: #320d02;
}

SCSS

$rust: #a83c09;
$rust-rgb: 168, 60, 9;
$rust-light: mix(#fff, $rust, 20%);
$rust-dark: mix(#000, $rust, 20%);

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