Examine source code of Fluent

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Fluent",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(25, 25, 25)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(30, 30, 30)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(15, 15, 15)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(6, 91, 225)",
      "popup": "rgb(25, 25, 25)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(6, 91, 225)",
      "button_background_hover": "rgb(6, 91, 225)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(25, 25, 25)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(6, 91, 225)",
      "popup_highlight": "rgb(6, 91, 225)",
      "tab_background_separator": "rgba(30, 30, 30, 0)",
      "tab_loading": "rgb(25, 25, 25)"
    }
  }
}