In the last version of Coolors, you can finally organize your palettes in projects and collections.
For example, you may want to save together all the colors you're going to use in the next project and maybe collect them by style saving them in different collections.
To create a project or collection go to the Generator, open the Palettes Sidebar and select the tab Library. Click on All palettes to open the filters then click on the plus icon next to Projects or Collections.
You can also add new projects and collections directly when you're saving a new palette.