I am using eclipse JUNO.
When the cursor goes over the variable name (in resource and debug perspective) the details of the variable name in displayed in a small window like a box..How to change the color of the window and its details..
In my case the color is actually in black background and white foreground.
Are you using Eclipse on Ubuntu? There this seems to be a common problem caused by default color settings of the operating system.
https://askubuntu.com/questions/70599/how-to-change-tooltip-background-color-in-unity https://askubuntu.com/questions/1620/how-to-fix-unreadable-tooltips-in-eclipse-helios https://askubuntu.com/questions/45001/how-to-fix-black-tooltips-in-eclipse