Examine source code of Elemental Blues

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Elemental Blues",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 58, 91)",
      "toolbar_text": "rgb(114, 153, 255)",
      "frame": "rgb(0, 155, 255)",
      "tab_background_text": "rgb(114, 153, 255)",
      "toolbar_field": "rgb(32, 190, 204)",
      "toolbar_field_text": "rgb(17, 67, 182)",
      "tab_line": "rgb(0, 241, 255)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(120, 34, 231)",
      "tab_loading": "rgb(0, 241, 255)"
    }
  }
}