Examine source code of Wildflowers...

{
  "theme": {
    "images": {
      "theme_frame": "Wildflowers_header_byLisa.jpg"
    },
    "colors": {
      "frame": "#44481b",
      "tab_background_text": "#ffffcc"
    }
  },
  "version": "2.0",
  "name": "Wildflowers...",
  "manifest_version": 2,
  "description": "red poppy, cornflower, corncockle, corn marigold and corn chamomile, flowers, field\n\nchild friendly persona\n\nPersonas by LisaAtTheBeach"
}