#293600

CSS

:root {
  --dark-olive: #293600;
  --dark-olive-rgb: 41 54 0;
  --dark-olive-oklch: oklch(0.31 0.076 123.2);
}

.element {
  color: var(--dark-olive);
  background-color: hsl(74 100% 11%);
  border-color: oklch(0.31 0.076 123.2);
}

Tailwind CSS v4

@theme {
  --color-dark-olive: #293600;
  --color-dark-olive-50: #f0f9e2;
  --color-dark-olive-100: #e2edd2;
  --color-dark-olive-200: #ccdbb7;
  --color-dark-olive-300: #aebf94;
  --color-dark-olive-400: #96a674;
  --color-dark-olive-500: #7c8f55;
  --color-dark-olive-600: #697948;
  --color-dark-olive-700: #54613a;
  --color-dark-olive-800: #3e4728;
  --color-dark-olive-900: #2b311b;
  --color-dark-olive-950: #181d0b;
}

SCSS

$dark-olive: #293600;
$dark-olive-rgb: 41, 54, 0;
$dark-olive-light: mix(#fff, $dark-olive, 20%);
$dark-olive-dark: mix(#000, $dark-olive, 20%);

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