#726C5B

CSS

:root {
  --archaeology: #726c5b;
  --archaeology-rgb: 114 108 91;
  --archaeology-oklch: oklch(0.532 0.027 90.9);
}

.element {
  color: var(--archaeology);
  background-color: hsl(44 11% 40%);
  border-color: oklch(0.532 0.027 90.9);
}

Tailwind CSS v4

@theme {
  --color-archaeology: #726c5b;
  --color-archaeology-50: #f8f5ed;
  --color-archaeology-100: #ebe8de;
  --color-archaeology-200: #d8d4c8;
  --color-archaeology-300: #bcb7a8;
  --color-archaeology-400: #a49e8d;
  --color-archaeology-500: #8d8672;
  --color-archaeology-600: #777161;
  --color-archaeology-700: #5f5b4d;
  --color-archaeology-800: #464238;
  --color-archaeology-900: #302e26;
  --color-archaeology-950: #1d1a15;
}

SCSS

$archaeology: #726c5b;
$archaeology-rgb: 114, 108, 91;
$archaeology-light: mix(#fff, $archaeology, 20%);
$archaeology-dark: mix(#000, $archaeology, 20%);

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