#7F6700

CSS

:root {
  --muddy-brown: #7f6700;
  --muddy-brown-rgb: 127 103 0;
  --muddy-brown-oklch: oklch(0.522 0.107 92.8);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(49 100% 25%);
  border-color: oklch(0.522 0.107 92.8);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7f6700;
  --color-muddy-brown-50: #fff5d3;
  --color-muddy-brown-100: #f3e8c0;
  --color-muddy-brown-200: #e2d4a0;
  --color-muddy-brown-300: #c9b777;
  --color-muddy-brown-400: #b49d4f;
  --color-muddy-brown-500: #9f841e;
  --color-muddy-brown-600: #866f1d;
  --color-muddy-brown-700: #6c5917;
  --color-muddy-brown-800: #50400e;
  --color-muddy-brown-900: #382c08;
  --color-muddy-brown-950: #231900;
}

SCSS

$muddy-brown: #7f6700;
$muddy-brown-rgb: 127, 103, 0;
$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);
}