You can colorize events or parts with the Color tool. By default, events or parts follow the color of the corresponding track. However, you can overwrite this setting and, for example, select the same color for events or parts that reside on different tracks.
Procedure
Result
The events or parts are colorized and no longer follow color changes of the track.
Note
You can also Ctrl/Cmd-click an event or part with the Color tool to open the Choose Event Color pane or to select colors by names.