Examine source code of Nightly Blue

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Nightly Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 32, 36)",
      "toolbar_field": "rgb(33, 47, 54)",
      "toolbar_field_text": "rgb(225, 232, 241)",
      "tab_line": "rgb(190, 141, 177)",
      "popup": "rgb(33, 47, 54)",
      "popup_text": "rgb(225, 232, 241)",
      "tab_loading": "rgb(190, 141, 177)",
      "bookmark_text": "rgb(225, 232, 241)",
      "frame": "rgb(33, 47, 54)",
      "tab_background_text": "rgb(225, 232, 241)"
    }
  }
}