How to get this Indicator Histogram color state

 

I have a indicator which draw a histogram with 3 colors


Color 1 = Blue

Color 2 = Red

Color 3 = Gray


How do i get the color draw on the current bar and previous 1 bar onto a variable or show it at Alert("Current Color is  : " + color );


I attached the Indicator. I was wondering if we could get value from a histogram, I also try use iCustom but not getting the value, all i get is 0.0000000



Files:
gmts-tape.mq4  24 kb