Examine source code of black theme mixed

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "black theme mixed",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(14, 18, 23)",
      "toolbar_text": "rgb(150, 162, 146)",
      "frame": "rgb(14, 18, 23)",
      "tab_background_text": "rgb(200, 80, 255)",
      "toolbar_field": "rgb(18, 18, 18)",
      "toolbar_field_text": "rgb(0, 255, 194)",
      "tab_line": "rgb(150, 162, 146)",
      "popup": "rgba(14, 18, 23, 0.92)",
      "popup_text": "rgb(0, 255, 194)",
      "icons": "rgb(255, 0, 76)",
      "ntp_background": "rgb(14, 18, 23)",
      "ntp_text": "rgb(236, 192, 255)",
      "popup_border": "rgb(255, 0, 76)",
      "popup_highlight_text": "rgb(0, 255, 59)",
      "popup_highlight": "rgb(7, 7, 43)",
      "tab_text": "rgb(0, 255, 194)",
      "toolbar_bottom_separator": "rgb(14, 18, 23)",
      "toolbar_field_highlight_text": "rgb(23, 255, 74)",
      "toolbar_field_highlight": "rgb(14, 18, 23)",
      "toolbar_field_text_focus": "rgb(212, 10, 253)",
      "toolbar_top_separator": "rgb(14, 18, 23)",
      "tab_loading": "rgb(150, 162, 146)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9c19f42-76c9-487a-baa6-13791bdb4fc2}"
    }
  }
}