Examine source code of The space for you. .

{
  "theme": {
    "images": {
      "theme_frame": "0111--akal4--kirisuna-yokonagare.jpg"
    },
    "colors": {
      "frame": "#f8d0fa",
      "tab_background_text": "#f7efef"
    }
  },
  "version": "2.0",
  "name": "The space for you. .",
  "manifest_version": 2,
  "description": "あなたのためのスペース。。\n\n\n\n\n0111--akal4--kirisuna-yokonagare●"
}