Examine source code of NPC

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "NPC",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(22, 22, 22)",
      "toolbar_text": "rgb(3, 119, 7)",
      "frame": "rgb(14, 14, 14)",
      "tab_background_text": "rgb(103, 11, 2)",
      "toolbar_field": "rgb(10, 43, 5)",
      "toolbar_field_text": "rgb(8, 255, 1)",
      "tab_line": "rgb(0, 167, 20)",
      "popup": "rgb(17, 17, 17)",
      "popup_text": "rgb(22, 255, 0)",
      "tab_loading": "rgb(0, 167, 20)"
    }
  }
}