#7C651C

CSS

:root {
  --muddy-brown: #7c651c;
  --muddy-brown-rgb: 124 101 28;
  --muddy-brown-oklch: oklch(0.516 0.093 90.7);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(46 63% 30%);
  border-color: oklch(0.516 0.093 90.7);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7c651c;
  --color-muddy-brown-50: #fef5d8;
  --color-muddy-brown-100: #f3e8c5;
  --color-muddy-brown-200: #e2d4a7;
  --color-muddy-brown-300: #c8b780;
  --color-muddy-brown-400: #b39c5c;
  --color-muddy-brown-500: #9e8334;
  --color-muddy-brown-600: #856f2e;
  --color-muddy-brown-700: #6b5924;
  --color-muddy-brown-800: #504018;
  --color-muddy-brown-900: #372c0f;
  --color-muddy-brown-950: #221903;
}

SCSS

$muddy-brown: #7c651c;
$muddy-brown-rgb: 124, 101, 28;
$muddy-brown-light: mix(#fff, $muddy-brown, 20%);
$muddy-brown-dark: mix(#000, $muddy-brown, 20%);

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