Examine source code of Vocaloid Miku Future

{
  "theme": {
    "images": {
      "theme_frame": "mikuHEADER.png"
    },
    "colors": {
      "frame": "#79c0eb",
      "tab_background_text": "#2b3f57"
    }
  },
  "version": "2.0",
  "name": "Vocaloid Miku Future",
  "manifest_version": 2,
  "description": "Miku Hatsune, futuristic look~"
}