Examine source code of Nice Sunset

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nice Sunset",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(80, 11, 2)",
      "toolbar_text": "rgb(220, 115, 117)",
      "frame": "rgb(109, 30, 14)",
      "tab_background_text": "rgb(166, 91, 91)",
      "toolbar_field": "rgb(83, 33, 1)",
      "toolbar_field_text": "rgb(166, 91, 91)",
      "tab_line": "rgb(145, 18, 2)",
      "popup": "rgb(80, 11, 2)",
      "popup_text": "rgb(136, 97, 72)",
      "tab_loading": "rgb(145, 18, 2)"
    }
  }
}