#677134

CSS

:root {
  --muddy-green: #677134;
  --muddy-green-rgb: 103 113 52;
  --muddy-green-oklch: oklch(0.526 0.086 117.1);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(70 37% 32%);
  border-color: oklch(0.526 0.086 117.1);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #677134;
  --color-muddy-green-50: #f2f9de;
  --color-muddy-green-100: #e4eccd;
  --color-muddy-green-200: #d0dab1;
  --color-muddy-green-300: #b2be8d;
  --color-muddy-green-400: #9aa56a;
  --color-muddy-green-500: #828e49;
  --color-muddy-green-600: #6e783e;
  --color-muddy-green-700: #586032;
  --color-muddy-green-800: #414622;
  --color-muddy-green-900: #2d3016;
  --color-muddy-green-950: #1a1d08;
}

SCSS

$muddy-green: #677134;
$muddy-green-rgb: 103, 113, 52;
$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);
}