Examine source code of shiny blue cross

{
  "theme": {
    "images": {
      "theme_frame": "shiningbluecross.jpg"
    },
    "colors": {
      "frame": "#2b55ed",
      "tab_background_text": "#2c3af5"
    }
  },
  "version": "2.0",
  "name": "shiny blue cross",
  "manifest_version": 2,
  "description": "a blue shining cross on a blue sky background"
}