Examine source code of Light Gray Hearts

{
  "theme": {
    "images": {
      "theme_frame": "grayhearts.PNG"
    },
    "colors": {
      "frame": "#031454",
      "tab_background_text": "#031454"
    }
  },
  "version": "2.0",
  "name": "Light Gray Hearts",
  "manifest_version": 2,
  "description": "Grey, Gray, Hearts, Heart, Light"
}