Examine source code of Gradient Theme

{
  "name": "Gradient Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "gradient-theme.jpg"
    },
    "colors": {
      "frame": "rgba(4, 74, 224, 0)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(242, 8, 8, 1)",
      "toolbar_field": "rgba(245, 14, 14, 0.15)"
    }
  }
}