Examine source code of Purple Animated Cat Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Animated Cat Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(42, 33, 95)",
      "toolbar_text": "rgb(172, 149, 228)",
      "frame": "rgb(33, 20, 68)",
      "tab_background_text": "rgb(184, 158, 245)",
      "toolbar_field": "rgb(38, 29, 50)",
      "toolbar_field_text": "rgb(161, 142, 241)",
      "tab_line": "rgb(178, 150, 255)",
      "popup": "rgb(36, 29, 57)",
      "popup_text": "rgb(154, 126, 219)",
      "tab_loading": "rgb(178, 150, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1b0dd4dd-6753-4ea6-9a57-15da6694350e}"
    }
  }
}