Examine source code of Ontrthem

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ontrtheme3.2",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgba(84, 84, 98, 0.78)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(17, 21, 21)",
      "tab_background_text": "rgb(232, 228, 226)",
      "toolbar_field": "rgba(45, 45, 55, 0.98)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(218, 94, 20)",
      "popup": "rgb(117, 117, 135)",
      "popup_text": "rgb(253, 253, 253)",
      "icons_attention": "rgb(218, 94, 20)",
      "icons": "rgb(215, 204, 199)",
      "ntp_background": "rgb(43, 43, 48)",
      "ntp_text": "rgb(223, 223, 241)",
      "toolbar_field_border_focus": "rgb(218, 94, 20)",
      "toolbar_field_border": "rgb(56, 28, 11)",
      "tab_loading": "rgb(218, 94, 20)"
    }
  }
}