Examine source code of blue-ocean-dark-theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue-Green Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(3, 25, 43)",
      "toolbar_text": "rgb(7, 255, 255)",
      "frame": "rgb(18, 47, 73)",
      "tab_background_text": "rgb(24, 156, 180)",
      "toolbar_field": "rgb(38, 72, 102)",
      "toolbar_field_text": "rgb(0, 234, 255)",
      "tab_line": "rgb(0, 211, 251)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(0, 214, 254)",
      "tab_loading": "rgb(0, 211, 251)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca437238-d363-4a7c-93a7-1e3b634ea7ac}"
    }
  }
}