Examine source code of Under the sea17

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Under the sea",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(6, 203, 232, 0.15)",
      "toolbar_text": "rgb(12, 14, 71)",
      "frame": "rgb(28, 71, 227)",
      "tab_background_text": "rgb(12, 14, 71)",
      "toolbar_field": "rgba(162, 234, 235, 0.25)",
      "toolbar_field_text": "rgb(12, 14, 71)",
      "tab_line": "rgb(44, 222, 200)",
      "popup": "rgb(55, 159, 217)",
      "popup_text": "rgb(12, 14, 71)",
      "tab_loading": "rgb(44, 222, 200)"
    }
  }
}