Examine source code of le printemps

{
  "theme": {
    "images": {
      "theme_frame": "springtime.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#eb3434"
    }
  },
  "version": "2.0",
  "name": "le printemps",
  "manifest_version": 2,
  "description": "Thank god it's springtime!"
}