sharepoint online – Unable to style the Label Color of a Office UI Fabric React Drop Down Control

I am creating an SPFx 1.11 web part where I have imported Dropdown, IDropdownProps, IDropdownOption from office-ui-fabric-react as:

  import {   
  Dropdown,
  IDropdownProps,
  IDropdownOption  
} from 'office-ui-fabric-react';

However I need to Style the Label of the DropDown for which I need to import IDropdownStyles as well. However when I try to import IDropDownStyles, I get the below error:

office-ui-fabric-react/lib/Dropdown”‘ has no exported member ‘IDropdownStyles

Please find the attached code screenshot. The dependencies from package.json are listed below :

"dependencies": {
    "@fluentui/react": "^8.8.0",
    "@microsoft/sp-core-library": "~1.4.1",
    "@microsoft/sp-lodash-subset": "~1.4.1",
    "@microsoft/sp-office-ui-fabric-core": "^1.11.0",
    "@microsoft/sp-webpart-base": "~1.4.1",
    "@types/react": "15.6.6",
    "@types/react-dom": "15.5.6",
    "@types/webpack-env": ">=1.12.1 <1.14.0",
    "react": "15.6.2",
    "react-dom": "15.6.2"
  },
  "devDependencies": {
    "@microsoft/sp-build-web": "~1.4.1",
    "@microsoft/sp-module-interfaces": "~1.4.1",
    "@microsoft/sp-webpart-workbench": "~1.4.1",
    "gulp": "~3.9.1",
    "@types/chai": ">=3.4.34 <3.6.0",
    "@types/mocha": ">=2.2.33 <2.6.0",
    "ajv": "~5.2.2"
  }

Can anyone guide me on what I may be doing wrong here?

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