Examine source code of Blood Cubes

{
  "theme": {
    "images": {
      "theme_frame": "Untitled_image.jpg"
    },
    "colors": {
      "frame": "#0015f7",
      "tab_background_text": "#fa0808"
    }
  },
  "version": "2.0",
  "name": "Blood Cubes",
  "manifest_version": 2,
  "description": "My First Design, A Load Of Dark Red Cubes! :D"
}