#7E6B1C

CSS

:root {
  --muddy-brown: #7e6b1c;
  --muddy-brown-rgb: 126 107 28;
  --muddy-brown-oklch: oklch(0.531 0.098 94.9);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(48 64% 30%);
  border-color: oklch(0.531 0.098 94.9);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7e6b1c;
  --color-muddy-brown-50: #fdf6d7;
  --color-muddy-brown-100: #f1e9c4;
  --color-muddy-brown-200: #e0d5a6;
  --color-muddy-brown-300: #c5b87e;
  --color-muddy-brown-400: #b09e58;
  --color-muddy-brown-500: #9b852f;
  --color-muddy-brown-600: #837129;
  --color-muddy-brown-700: #695a21;
  --color-muddy-brown-800: #4e4115;
  --color-muddy-brown-900: #362d0e;
  --color-muddy-brown-950: #211a02;
}

SCSS

$muddy-brown: #7e6b1c;
$muddy-brown-rgb: 126, 107, 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);
}