#AA7329

CSS

:root {
  --hamtaro-brown: #aa7329;
  --hamtaro-brown-rgb: 170 115 41;
  --hamtaro-brown-oklch: oklch(0.6 0.112 70.2);
}

.element {
  color: var(--hamtaro-brown);
  background-color: hsl(34 61% 41%);
  border-color: oklch(0.6 0.112 70.2);
}

Tailwind CSS v4

@theme {
  --color-hamtaro-brown: #aa7329;
  --color-hamtaro-brown-50: #fff1d3;
  --color-hamtaro-brown-100: #ffe3c0;
  --color-hamtaro-brown-200: #f2cda0;
  --color-hamtaro-brown-300: #dbae77;
  --color-hamtaro-brown-400: #c89250;
  --color-hamtaro-brown-500: #b47720;
  --color-hamtaro-brown-600: #98651e;
  --color-hamtaro-brown-700: #7a5118;
  --color-hamtaro-brown-800: #5b3a10;
  --color-hamtaro-brown-900: #40280a;
  --color-hamtaro-brown-950: #291600;
}

SCSS

$hamtaro-brown: #aa7329;
$hamtaro-brown-rgb: 170, 115, 41;
$hamtaro-brown-light: mix(#fff, $hamtaro-brown, 20%);
$hamtaro-brown-dark: mix(#000, $hamtaro-brown, 20%);

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