Examine source code of GLTSS.org Invert

{
  "theme": {
    "images": {
      "theme_frame": "persona1_banner_invert.png"
    },
    "colors": {
      "frame": "#ffd000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "GLTSS.org Invert",
  "manifest_version": 2,
  "description": "A dark and 80's candy colour take on the gltss logo"
}