Examine source code of Modern Contrast Fox

{
  "manifest_version": 2,
  "version": "0.2.3",
  "name": "Modern Contrast Fox",
  "theme": {
    "colors": {
      "toolbar": "rgb(240,240,243)",
      "toolbar_field": "rgb(240,240,243)",
      "toolbar_field_text": "rgb(20,20,20)",
      "toolbar_field_focus": "rgb(240,240,243)",
      "toolbar_field_highlight": "rgb(0,120,215)",
      "toolbar_field_border": "rgb(220,220,223)",
      "toolbar_field_border_focus": "rgb(61,174,233)",
      "toolbar_top_separator": "rgb(230,230,233)",
      "toolbar_bottom_separator": "rgb(210,210,213)",
      "toolbar_vertical_separator": "rgb(180,180,183)",
      "bookmark_text": "rgb(20,20,20)",
      "tab_line": "rgb(230,230,233)",
      "tab_loading": "rgb(0,120,215)",
      "tab_background_separator": "rgb(240,240,243)",
      "ntp_background": "rgb(240,240,243)",
      "ntp_text": "rgb(20,20,20)",
      "frame": "rgb(230,230,233)",
      "tab_selected": "rgb(170,170,173)",
      "tab_text": "rgb(20,20,20)",
      "tab_background_text": "rgb(20,20,20)",
      "icons_attention": "rgb(0,120,215)",
      "button_background_hover": "hsla(0,0%,75%,.80)",
      "button_background_active": "hsla(0,0%,75%,.80)",
      "popup": "rgb(240,240,243)",
      "popup_border": "rgb(180,180,183)",
      "popup_text": "rgb(20,20,20)",
      "popup_highlight": "rgb(0,120,215)",
      "popup_highlight_text": "rgb(245,245,243)",
      "sidebar": "rgb(240,240,243)",
      "sidebar_border": "rgb(180,180,183)",
      "sidebar_text": "rgb(20,20,20)",
      "sidebar_highlight": "rgb(0,120,215)",
      "sidebar_highlight_text": "rgb(245,245,243)"
    }
  }
}