Examine source code of Night Mod

{
  "name": "Night Mod",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
    },
    "colors": {
      "frame": "rgba(0, 25, 79, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0.58)",
      "bookmark_text": "rgba(255, 0, 0, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(52, 136, 245, 1)"
    }
  }
}