Examine source code of PuzzledBlue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "PuzzledBlue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.78)",
      "toolbar_text": "rgb(4, 49, 89)",
      "frame": "rgb(81, 144, 205)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0.63)",
      "toolbar_field_text": "rgb(4, 49, 89)",
      "tab_line": "rgb(64, 113, 158)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(58, 102, 145)",
      "tab_loading": "rgb(64, 113, 158)"
    }
  }
}