Examine source code of k_Blueberries

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "k_Blueberries",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(64, 87, 117, 0.36)",
      "toolbar_text": "rgb(221, 237, 225)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(7, 7, 7)",
      "toolbar_field": "rgba(19, 38, 68, 0.58)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(246, 248, 251, 0.76)",
      "popup": "rgb(185, 201, 229)",
      "popup_text": "rgba(0, 6, 0, 0.76)",
      "tab_loading": "rgba(246, 248, 251, 0.76)"
    }
  }
}