Examine source code of purple-grid2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "purple-grid",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(96, 25, 102)",
      "toolbar_text": "rgb(70, 255, 95)",
      "frame": "rgb(53, 53, 53)",
      "tab_background_text": "rgb(70, 255, 95)",
      "toolbar_field": "rgb(255, 186, 236)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 93, 209)",
      "popup": "rgb(255, 186, 236)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(53, 53, 53)",
      "button_background_hover": "rgb(53, 53, 53)",
      "icons_attention": "rgb(70, 255, 95)",
      "icons": "rgb(70, 255, 95)",
      "ntp_background": "rgb(53, 53, 53)",
      "ntp_text": "rgb(70, 255, 95)",
      "popup_border": "rgb(255, 93, 209)",
      "sidebar_border": "rgb(255, 93, 209)",
      "sidebar_highlight": "rgb(96, 25, 102)",
      "sidebar_text": "rgb(70, 255, 95)",
      "tab_loading": "rgb(255, 93, 209)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3de432fc-44e9-453f-ad1b-acd15deb812c}"
    }
  }
}