Examine source code of Mountain River Theme

{
  "name": "Mountain River Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "oie_17223049kXTXwAam.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(75, 158, 242, 0.7)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(30, 53, 209, 0.64)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(224, 18, 18, 1)"
    }
  }
}