#697137

CSS

:root {
  --muddy-green: #697137;
  --muddy-green-rgb: 105 113 55;
  --muddy-green-oklch: oklch(0.528 0.082 115.7);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(68 35% 33%);
  border-color: oklch(0.528 0.082 115.7);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #697137;
  --color-muddy-green-50: #f3f9df;
  --color-muddy-green-100: #e5ecce;
  --color-muddy-green-200: #d1d9b2;
  --color-muddy-green-300: #b3be8e;
  --color-muddy-green-400: #9ca56c;
  --color-muddy-green-500: #848d4b;
  --color-muddy-green-600: #6f7741;
  --color-muddy-green-700: #595f33;
  --color-muddy-green-800: #424623;
  --color-muddy-green-900: #2e3017;
  --color-muddy-green-950: #1a1c08;
}

SCSS

$muddy-green: #697137;
$muddy-green-rgb: 105, 113, 55;
$muddy-green-light: mix(#fff, $muddy-green, 20%);
$muddy-green-dark: mix(#000, $muddy-green, 20%);

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