#697C37

CSS

:root {
  --muddy-green: #697c37;
  --muddy-green-rgb: 105 124 55;
  --muddy-green-oklch: oklch(0.555 0.097 122.4);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(77 39% 35%);
  border-color: oklch(0.555 0.097 122.4);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #697c37;
  --color-muddy-green-50: #effadc;
  --color-muddy-green-100: #e1eecb;
  --color-muddy-green-200: #cbdcaf;
  --color-muddy-green-300: #acc089;
  --color-muddy-green-400: #94a866;
  --color-muddy-green-500: #7b9043;
  --color-muddy-green-600: #687a39;
  --color-muddy-green-700: #53622e;
  --color-muddy-green-800: #3e471e;
  --color-muddy-green-900: #2a3114;
  --color-muddy-green-950: #181d06;
}

SCSS

$muddy-green: #697c37;
$muddy-green-rgb: 105, 124, 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);
}