Examine source code of Freedom Sunset

{
  "name": "Freedom Sunset",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(130, 45, 21, 1)",
      "tab_background_text": "rgba(252, 252, 96, 1)",
      "toolbar": "rgba(130, 46, 21, 0)",
      "bookmark_text": "rgba(250, 250, 97, 1)",
      "toolbar_field": "rgba(130, 46, 21, 0.07)",
      "toolbar_field_text": "rgba(252, 252, 244, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  }
}