Examine source code of TechMail

{
  "name": "1478030",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1478030.jpg"
    },
    "colors": {
      "frame": "rgba(247, 247, 247, 1)",
      "tab_background_text": "rgba(0, 218, 252, 0.81)",
      "toolbar": "rgba(58, 196, 250, 0.2)",
      "toolbar_field": "rgba(223, 239, 240, 0.59)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}