Color Palettes, or just Colors, are thematic color palettes chosen by designers to use while designing their outfits.
When being asked to design an outfit for a specific client, sometimes that client will require the use of a specific palette and only that palette can be used. The colors on a palette can be used not only to color the garment being designed, but also most of the details put onto the garment. If while designing, the client doesn't limit the choice to one palette, then more than one palette can be used and mixed with the others to create different looks.
Palettes contain between four and six color choices, usually put together with some sort of theme in mind.