Examine source code of Earl Grey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Earl Grey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(58, 89, 105, 0.17)",
      "toolbar_text": "rgb(9, 31, 31)",
      "frame": "rgb(136, 155, 156)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(243, 243, 220, 0.92)",
      "toolbar_field_text": "rgb(8, 12, 68)",
      "tab_line": "rgb(14, 182, 188)",
      "popup": "rgba(222, 222, 200, 0.82)",
      "popup_text": "rgb(5, 73, 98)",
      "tab_loading": "rgb(14, 182, 188)"
    }
  }
}