Examine source code of Blue on Blue

{
  "name": "Blue  on  Blue",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(62, 154, 240, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(60, 150, 240, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(60, 153, 240, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}