Examine source code of Your secure.

{
  "name": "Your secure.",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Document27-1.png"
    },
    "colors": {
      "frame": "rgba(0, 250, 21, 1)",
      "tab_background_text": "rgba(81, 255, 0, 1)",
      "bookmark_text": "rgba(17, 255, 0, 1)",
      "toolbar_field": "rgba(38, 255, 0, 1)",
      "toolbar_field_text": "rgba(51, 255, 0, 1)"
    }
  }
}