Examine source code of simple cut wood

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "bois coupé",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(90, 79, 79, 0.17)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(25, 25, 25)",
      "tab_background_text": "rgb(255, 250, 239)",
      "toolbar_field": "rgba(115, 111, 110, 0.15)",
      "toolbar_field_text": "rgb(255, 251, 249)",
      "tab_line": "rgb(251, 217, 2)",
      "popup": "rgb(87, 68, 59)",
      "popup_text": "rgb(252, 254, 255)",
      "icons": "rgb(255, 255, 255)",
      "ntp_text": "rgb(252, 250, 249)",
      "tab_loading": "rgb(251, 217, 2)"
    }
  }
}