Examine source code of Java Background

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Java Background",
  "theme": {
    "images": {
      "additional_backgrounds": []
    },
    "properties": {
      "additional_backgrounds_alignment": [],
      "additional_backgrounds_tiling": []
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.11)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(170, 170, 170, 0.35)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgba(40, 40, 40, 0.67)",
      "popup_text": "rgb(255, 255, 255)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(46, 46, 46)",
      "popup_border": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  }
}