Shell

CSS

:root {
  --shell: #dcc5bc;
  --shell-rgb: 220 197 188;
  --shell-oklch: oklch(0.84 0.029 42.6);
}

.element {
  color: var(--shell);
  background-color: hsl(17 31% 80%);
  border-color: oklch(0.84 0.029 42.6);
}

Tailwind CSS v4

@theme {
  --color-shell: #dcc5bc;
  --color-shell-50: #fdf3ee;
  --color-shell-100: #f1e5e0;
  --color-shell-200: #e0d1ca;
  --color-shell-300: #c5b3ac;
  --color-shell-400: #ae9991;
  --color-shell-500: #988077;
  --color-shell-600: #806d65;
  --color-shell-700: #675751;
  --color-shell-800: #4c3f3b;
  --color-shell-900: #342c28;
  --color-shell-950: #201916;
}

SCSS

$shell: #dcc5bc;
$shell-rgb: 220, 197, 188;
$shell-light: mix(#fff, $shell, 20%);
$shell-dark: mix(#000, $shell, 20%);

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