Examine source code of Silver X

{
  "theme": {
    "images": {
      "theme_frame": "White-Metal-Header.jpg"
    },
    "colors": {
      "frame": "#8a8888",
      "tab_background_text": "#1c1c1c"
    }
  },
  "version": "2.0",
  "name": "Silver X",
  "manifest_version": 2,
  "description": "Clean, light theme. ( metal metallic gradient silver white gray smooth chrome nickel brushed steel simple pure mercury bars beveled bevel menu beautiful mac gloss glossy shine shiny calm cool )"
}