Examine source code of Roussette

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Roussette",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(7, 50, 84, 0)",
      "toolbar_text": "rgb(1, 11, 18)",
      "frame": "rgb(67, 194, 218)",
      "tab_background_text": "rgb(1, 11, 20)",
      "toolbar_field": "rgba(38, 72, 102, 0)",
      "toolbar_field_text": "rgb(2, 14, 24)",
      "tab_line": "rgb(2, 16, 27)",
      "popup": "rgb(94, 214, 237)",
      "popup_text": "rgb(0, 4, 7)",
      "tab_loading": "rgb(2, 16, 27)"
    }
  }
}