Examine source code of Gengar Da Ghost Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gengar!",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(10, 22, 59)",
      "tab_background_text": "rgb(177, 177, 177)",
      "toolbar_field": "rgb(64, 54, 96)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(79, 69, 124)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_highlight_text": "rgb(106, 36, 174)",
      "popup_highlight": "rgb(248, 112, 140)",
      "tab_selected": "rgb(0, 0, 0)",
      "toolbar_field_border": "rgb(73, 8, 138)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d3cbf0a-e720-406e-b48b-c1c58d74c264}"
    }
  }
}