When working on several files from multiple projects, it is hard to tell at a glance to which project each editor belongs.

Sometimes you might even have multiple editors with the same title (for example when each project is a different revision of the same design) which is particularly confusing.

Go to menu Window > Preferences then DVT and check Color editor icons per project and project labels.

Now all editors belonging to the same project have icons of the same color. Furthermore, the project labels in the Project Explorer have the same color, serving as a quick color legend.

Tip: You can chose to color the project labels text or background in the Project Explorer

Tip: To change the default color of a project Right-click in the Project Explorer and go to Project > Change Color

Note: By default a project's color is computed using a hash function on the project name. This way you will get the same color for a specific project name, even if you switch workspaces or computers for example.

Note: This feature only works with Eclipse 4.x.