Examine source code of Purple_Shades

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple-Shades",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(46, 4, 78)",
      "toolbar_text": "rgb(200, 197, 195)",
      "frame": "rgb(19, 5, 40)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgb(17, 7, 30)",
      "toolbar_field_text": "rgb(103, 0, 255)",
      "tab_line": "rgb(103, 0, 255)",
      "popup": "rgb(10, 10, 34)",
      "popup_text": "rgb(103, 0, 255)",
      "button_background_active": "rgba(103, 0, 255, 0.54)",
      "button_background_hover": "rgba(21, 10, 34, 0.67)",
      "ntp_background": "rgb(19, 5, 40)",
      "popup_border": "rgb(103, 0, 255)",
      "tab_loading": "rgb(103, 0, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d654102a-3b8e-421f-9641-21594d960163}"
    }
  }
}