#7E6B1F

CSS

:root {
  --muddy-brown: #7e6b1f;
  --muddy-brown-rgb: 126 107 31;
  --muddy-brown-oklch: oklch(0.532 0.096 94.6);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(48 61% 31%);
  border-color: oklch(0.532 0.096 94.6);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7e6b1f;
  --color-muddy-brown-50: #fdf6d7;
  --color-muddy-brown-100: #f1e9c5;
  --color-muddy-brown-200: #e0d5a6;
  --color-muddy-brown-300: #c5b87f;
  --color-muddy-brown-400: #b09e5a;
  --color-muddy-brown-500: #9a8531;
  --color-muddy-brown-600: #83712b;
  --color-muddy-brown-700: #695a22;
  --color-muddy-brown-800: #4e4117;
  --color-muddy-brown-900: #362d0e;
  --color-muddy-brown-950: #211a03;
}

SCSS

$muddy-brown: #7e6b1f;
$muddy-brown-rgb: 126, 107, 31;
$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);
}