the tilde in the PS1 appears darker on the 10.18.1.30 server. The oranges looks wrong too as do the greens, which is the most obvious. It seems both servers have no problems showing 256-colours, though some seem missing, like the 1;30m
grey so not really sure why this is occurring, the one with the wrong colours is a RHEL7 server that I am now configuring, while the one with the correct colours is RHEL5 server that I am retiring.
updated graphic:
coloretest-256
on both machines. And the second thing is that you most likely have different color configuration in one putty session than in the other. Look in the putty-session configuration under Window->Colours. Because I can already see that you have a difference in how bold font is printed. Which you find under the same setting window.