I'm talking about manuals that pilots use to fly the aircraft and understand the systems...since Airbus is very "color" oriented, I would think that the use of color in these manuals enhances the training and understanding. When you can see the LOC in blue rather than black and white you do not have to use descriptive language. Or the flap/slat indicators...when they appear in amber or green or blue, whats the saying...a picture is worth a thousand words.