Examine source code of Winter evening

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Winter evening",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(112, 135, 112, 0.25)",
      "toolbar_text": "rgb(241, 237, 238)",
      "frame": "rgb(162, 173, 179)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(58, 61, 57)",
      "tab_line": "rgba(112, 182, 248, 0.7)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(26, 26, 27)",
      "tab_loading": "rgba(112, 182, 248, 0.7)"
    }
  }
}