Examine source code of JS-Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "JS-Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(38, 42, 43)",
      "toolbar_text": "rgb(209, 220, 224)",
      "frame": "rgb(38, 42, 43)",
      "tab_background_text": "rgb(209, 220, 224)",
      "toolbar_field": "rgba(20, 22, 22, 0.6)",
      "toolbar_field_text": "rgb(209, 220, 224)",
      "tab_line": "rgb(78, 120, 128)",
      "popup": "rgb(38, 42, 43)",
      "popup_text": "rgb(209, 220, 224)",
      "toolbar_field_border_focus": "rgb(78, 120, 128)",
      "toolbar_field_focus": "rgb(38, 42, 43)",
      "toolbar_field_highlight": "rgb(78, 120, 128)",
      "tab_loading": "rgb(78, 120, 128)"
    }
  }
}