Examine source code of HTTPS://Theme

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "D.A.R?K",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(33, 35, 35)",
      "toolbar_field": "rgb(74, 75, 75)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(122, 126, 199)",
      "popup": "rgb(229, 229, 229)",
      "popup_text": "rgb(29, 29, 29)",
      "tab_loading": "rgb(122, 126, 199)",
      "bookmark_text": "rgb(222, 222, 222)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)"
    }
  }
}