Examine source code of The Summonerxo

{
  "theme": {
    "images": {
      "theme_frame": "summonerheader.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#171010"
    }
  },
  "version": "2.0",
  "name": "The Summonerxo",
  "manifest_version": 2,
  "description": "Just a Summoner thing :P\nI don't think it'll look that good, but what ever, I'm in a Summoner mood so I will have the Summoner end of story."
}