Examine source code of ZhenBronze

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gunmetal Bronze",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(219, 220, 219)",
      "toolbar_text": "rgb(45, 50, 35)",
      "frame": "rgb(43, 43, 43)",
      "tab_background_text": "rgb(170, 140, 120)",
      "toolbar_field": "rgba(255, 255, 255, 0.7)",
      "toolbar_field_text": "rgb(45, 50, 35)",
      "tab_line": "rgb(245, 185, 40)",
      "popup": "rgb(219, 220, 219)",
      "popup_text": "rgb(45, 50, 35)",
      "tab_loading": "rgb(245, 185, 40)"
    }
  }
}