Communication is the exchange of information and the process of communication is the steps we go through to exchange the information.
If you want to break it down based on the system of Chakras. The throat chakra which is associated with communication works well with the stone turquoise. So I believe that Blue can be considered a color associated with communication.
They are often the same thing, however, not all forms of entertainment are considered art by the people who view it.
Planning, Programming, Budgeting, and Execution
For communication satellites the range is much higher than that of communication relay. Communication Satellite can cover up to several thousands of kilometers. For communication relay, the uplink and the downlink frequency is the same. But for communication satellites the uplink and the downlink frequencies are different in order to avoid interference.
Graphic Communication and Graphic Design are not the same major. Graphic design is a program in which you learn design on computers based off of principles of color, 2-D and 3-D design. Graphic communications, however is the study of print and digital media. In graphic communication, it is considered both an art and a science in which you study quality and potentials of printing and digital media.