My Apple Remote Desktop has gone to black and white display. How can I get the color back?

On Friday my ARD was displaying the client computers in color. On Saturday it would only display client desktops in black and white. It is very hard to decipher what is there. Some things are unreadable. Icons don't show up correctly. I have tried repairing permissions. I have tried every pull down menu to see if a setting has been changed. I can find to reason for this. Can anyone help me.