Examine source code of Soft dark purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "soft purple",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(23, 27, 30)",
      "toolbar_text": "rgb(189, 189, 189)",
      "frame": "rgb(11, 11, 14)",
      "tab_background_text": "rgb(189, 189, 189)",
      "toolbar_field": "rgba(36, 41, 46, 0.35)",
      "toolbar_field_text": "rgb(189, 189, 189)",
      "tab_line": "rgb(90, 44, 193)",
      "popup": "rgb(23, 27, 30)",
      "popup_text": "rgb(189, 189, 189)",
      "button_background_active": "rgb(90, 44, 193)",
      "button_background_hover": "rgb(90, 44, 193)",
      "icons": "rgb(189, 189, 189)",
      "popup_highlight": "rgb(90, 44, 193)",
      "sidebar_highlight": "rgb(90, 44, 193)",
      "sidebar": "rgb(23, 27, 30)",
      "toolbar_field_highlight": "rgb(90, 44, 193)",
      "tab_loading": "rgb(90, 44, 193)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e99a75a2-0658-4ef0-afcf-f6cc82e7a719}"
    }
  }
}