Examine source code of Giraffe Walk

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#f5f5f5",
      "tab_background_text": "#075e2e"
    }
  },
  "version": "2.0",
  "name": "Giraffe Walk",
  "manifest_version": 2,
  "description": "I like giraffes, and have a collection of them. I think this is a fun theme."
}