Examine source code of late summer meadow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Summer Meadow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(165, 163, 169)",
      "toolbar_text": "rgb(34, 37, 30)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(34, 37, 30)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(34, 37, 30)",
      "tab_line": "rgb(34, 37, 30)",
      "popup": "rgb(122, 116, 131)",
      "popup_text": "rgb(34, 37, 30)",
      "tab_loading": "rgb(34, 37, 30)"
    }
  }
}