Examine source code of Dark Pattern gmt

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dark pattern",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(200, 200, 200, 0.2)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(75, 75, 75)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0.25)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(200, 200, 200, 0.15)",
      "popup": "rgba(200, 200, 200, 0.6)",
      "popup_text": "rgb(75, 75, 75)",
      "frame_inactive": "rgb(75, 75, 75)",
      "ntp_background": "rgb(85, 85, 85)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(75, 75, 75)",
      "tab_loading": "rgba(200, 200, 200, 0.15)"
    }
  }
}