Examine source code of MIKU

{
  "name": "MIKU",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "MIKUMIKUKU.png"
    },
    "colors": {
      "frame": "rgba(56, 96, 112, 1)",
      "tab_background_text": "rgba(50, 65, 71, 1)",
      "toolbar": "rgba(171, 209, 219, 0.49)",
      "bookmark_text": "rgba(45, 116, 125, 1)",
      "toolbar_field": "rgba(58, 88, 94, 0.34)"
    }
  }
}