Examine source code of mat_wood

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "mat_wood",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(105, 105, 105, 0.8)",
      "toolbar_text": "rgb(225, 225, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 250, 250)",
      "toolbar_field": "rgb(128, 128, 128)",
      "toolbar_field_text": "rgb(240, 255, 240)",
      "tab_line": "rgb(0, 0, 205)",
      "popup": "rgb(22, 54, 75)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(0, 0, 205)"
    }
  }
}