#537368

CSS

:root {
  --dark-forest: #537368;
  --dark-forest-rgb: 83 115 104;
  --dark-forest-oklch: oklch(0.527 0.041 171.4);
}

.element {
  color: var(--dark-forest);
  background-color: hsl(159 16% 39%);
  border-color: oklch(0.527 0.041 171.4);
}

Tailwind CSS v4

@theme {
  --color-dark-forest: #537368;
  --color-dark-forest-50: #eaf9f4;
  --color-dark-forest-100: #dbede7;
  --color-dark-forest-200: #c3dad3;
  --color-dark-forest-300: #a3bfb5;
  --color-dark-forest-400: #87a79b;
  --color-dark-forest-500: #6b8f83;
  --color-dark-forest-600: #5b796f;
  --color-dark-forest-700: #486158;
  --color-dark-forest-800: #344740;
  --color-dark-forest-900: #24312c;
  --color-dark-forest-950: #131d19;
}

SCSS

$dark-forest: #537368;
$dark-forest-rgb: 83, 115, 104;
$dark-forest-light: mix(#fff, $dark-forest, 20%);
$dark-forest-dark: mix(#000, $dark-forest, 20%);

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