Examine source code of Backslash

{
  "name": "Backslash",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "michael whelan_horror_dead end 1.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(245, 235, 235, 1)",
      "toolbar": "rgba(15, 14, 14, 1)",
      "bookmark_text": "rgba(245, 10, 10, 1)",
      "toolbar_field_text": "rgba(14, 112, 240, 1)"
    }
  }
}