How to change Jupyter Notebook theme when using R Kernel?

I want to change the Jupyter theme from within the notebook. I am running R Kernel. I found many options/ suggestions such as

jt -t <theme_name>

and from within the notebook using

!jt -t <theme_name>

The above work perfect for Python kernel. However, if I use the same for R kernel I get the following error

!jt -t grade3

Error in parse(text = x, srcfile = src): <text>:1:8: unexpected symbol
1: !jt -t grade3
           ^
Traceback:

I have tried to look for the solution but could not find any discussion on any forum. Is there is solution?