While using Inheritance property, the derived class does not take the data members of the template base class. Why is that and how can it be solved?

Question

The base class here is Rectangle and it is a template class. I have derived a class called ColorRectangle from Rectangle and it is also a template class. But ColorRectangle cannot access the protected data members of Rectangle. How can I solve this?

Rectangle header file

#include<iostream>
using namespace std;

template <class T>
class Rectangle{
protected:
    T length;
    T breadth;
public:
    void setLength(T len){
        length = len;
    }
    void setBreadth(T bre){
        breadth = bre;
    }

    T getLength(){
        return length;
    }
    T getBreadth(){
        return breadth;
    }
    T area(){
        return length*breadth;
    }
};

ColorRectangle Header file

#include<iostream>
#include"Rectangle.h"
using namespace std;

template <class T>
class ColorRectangle:public Rectangle<T>{
  private:
    T borderWidth;
    string borderColor;

  public:
    void setBwidth(T bw){
        borderWidth = bw;
    }
    void setColor(string bc){
        borderColor = bc;
    }
    T calcPerimeter(){
        return 2 * (length + breadth);  
    }
};