Examine source code of Trees are Awesome

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Trees are Awesome ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(1, 11, 1, 0.53)",
      "toolbar_text": "rgb(236, 242, 234)",
      "frame": "rgb(228, 236, 227)",
      "tab_background_text": "rgb(251, 255, 250)",
      "toolbar_field": "rgba(38, 102, 48, 0.03)",
      "toolbar_field_text": "rgb(236, 244, 237)",
      "tab_line": "rgb(64, 25, 3)",
      "popup": "rgba(77, 105, 70, 0.72)",
      "popup_text": "rgb(15, 15, 15)",
      "ntp_background": "rgb(186, 247, 181)",
      "popup_border": "rgb(163, 255, 156)",
      "sidebar_border": "rgb(15, 255, 0)",
      "sidebar_text": "rgb(6, 6, 6)",
      "sidebar": "rgb(134, 253, 126)",
      "tab_loading": "rgb(248, 241, 237)",
      "toolbar_vertical_separator": "rgb(244, 243, 251)"
    }
  }
}