Examine source code of Lime Leaves

{
  "theme": {
    "images": {
      "theme_frame": "top9.png"
    },
    "colors": {
      "frame": "#7d7d7d",
      "tab_background_text": "#dddddd"
    }
  },
  "version": "2.0",
  "name": "Lime Leaves",
  "manifest_version": 2,
  "description": "Soft lime-colored leaves up close.\n\nFor Tab Mix Plus users, I recommend the following:\n - White bold text on current tab with dark lime background.\n - White text on other tabs with dark grey background at 20% opacity.\n - Unread tabs same as other but optionally red, yellow, or orange text, depending on taste."
}