Examine source code of sunsetsky

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "sunset",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(75, 2, 56)",
      "toolbar_text": "rgb(254, 81, 3)",
      "frame": "rgb(254, 33, 3)",
      "tab_background_text": "rgb(116, 31, 19)",
      "toolbar_field": "rgb(116, 31, 19)",
      "toolbar_field_text": "rgb(32, 1, 25)",
      "tab_line": "rgb(255, 51, 51)",
      "popup": "rgb(32, 1, 25)",
      "popup_text": "rgb(255, 66, 2)",
      "tab_loading": "rgb(255, 51, 51)"
    }
  }
}