From the wiki:
This suggestion comes from UCLA; it assists you in keeping track of sources. When you add a note set its color (click on the colored box by the title) according to the following scheme.
- Red indicates a direct quote [often a clipping] – make sure you note the source
- Blue indicates a summary – make sure you note the source if it isn’t “common knowledge”
- Green indicates a paraphrase - make sure you note the source if it isn’t “common knowledge”
- Purple indicates personal thoughts – others will need to quote you
