Examine source code of flowers_seeds

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "flowers_seeds",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(41, 31, 85, 0.31)",
      "toolbar_text": "rgba(250, 252, 255, 0.87)",
      "frame": "rgb(30, 21, 12)",
      "tab_background_text": "rgb(255, 210, 183)",
      "toolbar_field": "rgba(20, 43, 85, 0.87)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(105, 79, 49, 0.13)",
      "popup": "rgba(18, 30, 49, 0.87)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgba(105, 79, 49, 0.13)"
    }
  }
}