Free/cheap VNC programs for windows vista that WON'T change my theme?

I’ve tried two dfferent VNC clients and both canged my window coloer from graphite to basic (blue), (or let me change it manualy, the link to colors leads somewhere else) and the only way to change it back is to uninstall the program. I used a RDM and it only changed the theme while I was using it (which I’m fine with). Can anyone help?