Object Tracking color

import numpy as np
import cv2
def main():    
    cap = cv2.VideoCapture(0)
    if cap.isOpened():
        ret,frame = cap.read()
    else:
        ret = False
    
    while ret:
        ret,frame = cap.read()
        hsv = cv2.cvtColor(frame,cv2.COLOR_BGR2HSV)
        #blue color
#        low = np.array([100,50,50])
#        high = np.array([140,255,255])
         
        #green color
#        low = np.array([40,50,50])
#        high = np.array([80,255,255])
        #red color
        low = np.array([140,50,50])
        high = np.array([180,255,255])
        
        image_mask = cv2.inRange(hsv,low,high)
        output = cv2.bitwise_and(frame,frame,mask = image_mask)
        
        cv2.imshow("Blue masked",image_mask)
        cv2.imshow("Original Video Feed",frame)
        cv2.imshow("Color Tracking",output)
        
        if cv2.waitKey(1) == 27:
            break
    
    cv2.destroyAllWindows()    
    cap.release()
       
  
if __name__ == "__main__":
    main()