Ｕbuntu tips color

Ubuntu tips for java developers:

Eclipse documentation tooltips are default black in Ubuntu 12.04, you can not read the tooltips.  To change the tooltips color,

Install Gnome Color Chooser:

sudo apt-get install gnome-color-chooser

Run Gnome Color Chooser, in Specific tab, you can setup background/foreground colors for tooltips. I am using for foreground black(#000000), background blue(#C2DFFD). Apply and close Gnome Color Chooser.