#69703B

CSS

:root {
  --muddy-green: #69703b;
  --muddy-green-rgb: 105 112 59;
  --muddy-green-oklch: oklch(0.526 0.076 115.2);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(68 31% 34%);
  border-color: oklch(0.526 0.076 115.2);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #69703b;
  --color-muddy-green-50: #f3f8e0;
  --color-muddy-green-100: #e5ecd0;
  --color-muddy-green-200: #d1d9b5;
  --color-muddy-green-300: #b4bd91;
  --color-muddy-green-400: #9ca470;
  --color-muddy-green-500: #848c50;
  --color-muddy-green-600: #707745;
  --color-muddy-green-700: #595f37;
  --color-muddy-green-800: #424526;
  --color-muddy-green-900: #2e3019;
  --color-muddy-green-950: #1b1c0a;
}

SCSS

$muddy-green: #69703b;
$muddy-green-rgb: 105, 112, 59;
$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);
}