Examine source code of Nackay

{
  "name": "Nackay",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Sans titre-3.png"
    },
    "colors": {
      "frame": "rgba(50, 50, 50, 1)",
      "tab_background_text": "rgba(55, 252, 180, 1)",
      "toolbar": "rgba(50, 50, 50, 1)",
      "bookmark_text": "rgba(55, 252, 180, 1)",
      "toolbar_field": "rgba(245, 0, 0, 0)",
      "toolbar_field_text": "rgba(58, 250, 180, 1)"
    }
  }
}