Examine source code of Balloon Hearts

{
  "theme": {
    "images": {
      "theme_frame": "Heart-Balloons_Header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#2a0887"
    }
  },
  "version": "2.0",
  "name": "Balloon Hearts",
  "manifest_version": 2,
  "description": "I do believe Love is in the Air. ;)\n\nCelebrate Valentine's Day with this lovely 3D Persona theme.\n\nCreated in Blender 3D and edited in Photoshop."
}