Examine source code of Gray Blue Subtle

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(28, 36, 42)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(16, 23, 31)",
      "tab_background_text": "rgb(222, 227, 197)",
      "toolbar_field": "rgb(16, 23, 31)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(28, 36, 42)",
      "popup": "rgb(28, 36, 42)",
      "popup_text": "rgb(222, 227, 197)",
      "button_background_active": "rgba(92, 62, 62, 0)",
      "icons": "rgb(255, 255, 255)",
      "popup_border": "rgb(28, 36, 42)",
      "popup_highlight": "rgba(189, 214, 232, 0)",
      "tab_loading": "rgb(28, 36, 42)"
    }
  }
}