Examine source code of Starter Pokemon Creme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#FEE8B7",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Starter Pokemon Creme",
  "manifest_version": 2,
  "description": "Pikachu, Bulbasaur, Charmander and Squirtle on a creme coloured background. Artwork by Olly Moss: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/8499d1d33d39c30178074d83e2eccab70d7cfd86fc101e7c1286137c8141f39e/http%3A//ollymoss.com\">ollymoss.com</a>"
}