Examine source code of Grey And Red Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Grey And Red Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(8, 6, 6, 0.57)",
      "toolbar_field_text": "rgb(210, 6, 6)",
      "tab_line": "rgb(197, 3, 3)",
      "popup": "rgb(24, 23, 23)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(32, 32, 32)",
      "ntp_text": "rgb(255, 255, 255)",
      "toolbar_vertical_separator": "rgb(232, 30, 30)",
      "tab_loading": "rgb(197, 3, 3)"
    }
  }
}