Acceptance testing, often referred to as Red-Box testing

yellow box testing - I am nt aware of

Simply yellow box testing is checking against the warning 
messages. The system properly throwing the warning messages 
or not?

Red box testing - User / Client can apply any techniques to 
accept the project. they will apply white box or grey box 
or black box for accepting the project. So we are calling 
the user acceptance testing as a redbox testing. also 
networking , peripherals testing and protocal testing 
called red box testing