You are right. It is supposed to be changed with the color chart font, but it does not -> tested in 2016 SP 4.0. Found it as a bug.
However, it works as expected in 2017 PR.1, see the images below:
Did not have access to 2016 SP 5.0 EV to see if it is fixed or not.
Hope it addressed your concern.
OK, thanks for that.
siavash is right.it seems like bug and should be fixed later on.