Examine source code of Bosque dark

{
  "theme": {
    "images": {
      "theme_frame": "caminooscuroseee.jpg"
    },
    "colors": {
      "frame": "#4e044f",
      "tab_background_text": "#f7f0d7"
    }
  },
  "version": "2.0",
  "name": "Bosque dark",
  "manifest_version": 2,
  "description": "Camino entre el bosque nuboso"
}