Examine source code of Yuumi

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Yuumi",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(217, 233, 238, 0.1)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgb(240, 240, 240)",
      "tab_line": "rgb(255, 247, 118)",
      "popup": "rgb(13, 11, 36)",
      "popup_text": "rgb(239, 207, 195)",
      "tab_loading": "rgb(255, 247, 118)",
      "bookmark_text": "rgb(143, 228, 248)",
      "frame": "rgb(13, 11, 36)",
      "tab_background_text": "rgb(239, 207, 195)"
    }
  }
}