Examine source code of Flutter glow

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#493e4a",
      "tab_background_text": "#cff5e7"
    }
  },
  "version": "2.0",
  "name": "Flutter glow",
  "manifest_version": 2,
  "description": "A dark butterfly/star theme that should be easy on the eyes."
}