Examine source code of Dark Theme with CAT

{
  "name": "Dark Theme with CAT",
  "manifest_version": 2,
  "version": "1.1",
  "description": "Simple dark theme with CAT",
  "theme": {
    "images": {
      "theme_frame": "main.gif"
    },
    "colors": {
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 0, 0, 0)",
      "tab_text": "white",
      "tab_loading": "white",
      "frame": "black",
      "button_background_active": "rgb(65, 0, 2)",
      "button_background_hover": "rgb(65, 0, 2)",
      "icons": "white",
      "popup": "black",
      "popup_border": "white",
      "popup_highlight": "white",
      "popup_highlight_text": "black"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1950bfc1-4c0c-4a6f-8c29-ce26d260e72e}"
    }
  }
}