Examine source code of OneDirection_eyes

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_1Deyes.JPG"
    },
    "colors": {
      "frame": "#fc0000",
      "tab_background_text": "#eeff00"
    }
  },
  "version": "2.0",
  "name": "OneDirection_eyes",
  "manifest_version": 2,
  "description": "the One Direction boys all have such darling eyes, so obviously I HAD to make this."
}