Examine source code of Steel Wash

{
  "theme": {
    "images": {
      "theme_frame": "steel_wash_header.jpg"
    },
    "colors": {
      "frame": "#110b2e",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Steel Wash",
  "manifest_version": 2,
  "description": "Based loosely on Chrome's default theme, this is a light unsaturated persona. Just enough gradient to be noticeable, just enough blue to not be gray."
}