Examine source code of Tata BT21

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Tata BT21",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "left center",
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(34, 34, 34)",
      "toolbar_text": "rgb(249, 232, 37)",
      "frame": "rgb(205, 47, 52)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(224, 14, 220)",
      "tab_line": "rgb(11, 11, 12)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(11, 11, 219)",
      "icons": "rgb(78, 98, 157)",
      "tab_selected": "rgb(62, 76, 196)",
      "tab_loading": "rgb(11, 11, 12)"
    }
  }
}