How to use the @uifabric/styling.ColorClassNames.white function in @uifabric/styling

public render() {
    const persona = <span>&nbsp;</span>;

    return <div>
      <div>
        <div>
          Graph UI
        </div>
        <div>
          {persona}
        </div>
      </div>
    </div>;
  }
}

private getPersonaStyles(props: IPersonaStyleProps): Partial {
    return {
      root: {
        color: ColorClassNames.white,
        float: "right"
      },
      textContent: {
        color: ColorClassNames.white
      },
      primaryText: {
        color: ColorClassNames.white
      },
      secondaryText: {
        color: ColorClassNames.white
      }
    };
  }
}

setInitialFocus={true}
      isOpen={isOpen}
    >
      <div>
        {title &amp;&amp; (
          <div>
            <div>
              {title}
            </div>
            <div>
              
            </div>
          </div>
        )}
        <div>
          {open &amp;&amp; (
            </div></div>

prevState =>
            prevState.logUrl === logUrl && {
              monacoProps: { value: text },
              monacoFooterButton: (
                
              ),
            },
        ),

const MonacoModal = ({isOpen, onDismiss, title, monacoProps}) => (
  <div>
    
      <div>
        {title &amp;&amp; (
          <div>
            <div>
              {title}
            </div>
            <div>
              
            </div>
          </div>
        )}
        <div>
          {open &amp;&amp; (</div></div></div>

const persona = (this.props.name) ? (
      )
      : (<span>&nbsp;</span>);

    return <div>
      <div>
        <div>
          Graph UI
        </div>
        <div>
          {persona}
        </div>
      </div>
    </div>;
  }

private getPersonaStyles(props: IPersonaStyleProps): Partial {
    return {
      root: {
        color: ColorClassNames.white,
        float: "right"
      },
      textContent: {
        color: ColorClassNames.white
      },
      primaryText: {
        color: ColorClassNames.white
      },
      secondaryText: {
        color: ColorClassNames.white
      }
    };
  }
}