#394513

CSS

:root {
  --dark-olive: #394513;
  --dark-olive-rgb: 57 69 19;
  --dark-olive-oklch: oklch(0.368 0.074 121.7);
}

.element {
  color: var(--dark-olive);
  background-color: hsl(74 57% 17%);
  border-color: oklch(0.368 0.074 121.7);
}

Tailwind CSS v4

@theme {
  --color-dark-olive: #394513;
  --color-dark-olive-50: #f1f9e2;
  --color-dark-olive-100: #e3ecd2;
  --color-dark-olive-200: #cedab8;
  --color-dark-olive-300: #b0be95;
  --color-dark-olive-400: #97a675;
  --color-dark-olive-500: #7e8e56;
  --color-dark-olive-600: #6b7849;
  --color-dark-olive-700: #55603a;
  --color-dark-olive-800: #3f4628;
  --color-dark-olive-900: #2b311b;
  --color-dark-olive-950: #191d0b;
}

SCSS

$dark-olive: #394513;
$dark-olive-rgb: 57, 69, 19;
$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);
}