Examine source code of Calens Silver

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#c0cacf",
      "tab_background_text": "#0e0a00"
    }
  },
  "version": "2.0",
  "name": "Calens Silver",
  "manifest_version": 2,
  "description": "Calen toned silver simple design.\nI added extremely bluish green color so that it looks more silver color."
}