Examine source code of Dark Light Night View

{
  "name": "Dark Light Night View",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "effervescency_1920x1200.jpg"
    },
    "colors": {
      "frame": "rgba(41, 42, 51, 1)",
      "tab_background_text": "rgba(139, 144, 150, 1)",
      "toolbar": "rgb(31, 34, 61)",
      "bookmark_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(205, 35, 185)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{77c7fe24-80b4-4b53-94e1-3601ceb7c99d}"
    }
  }
}