Setting the Screen Colors in a Home3270 Session
Because protocol converters translate the 3270 (EBCDIC) data stream into an ASCII data stream, the original information about the 3270 fields is lost, and all the field attributes of the 3270 screen are treated as extended attributes. Because of this, you must select the Extended Color category in order to change the colors of characters on the screen. Changing base colors will have no effect.
For example, if you want to change the color of characters that appear in green on a black background, select Extended Color - Green, then click or drag-and-drop the color you want for the characters (and for the background if you wish). Do not change the appropriate Base Color because the change will have no effect.