Color swatches are small samples or examples of different colors. They are used to show or choose specific colors that can be used for various things like painting, designing, or selecting clothes. Full definition
«For some reason,» says Raad in the text piece accompanying the work, «I needed to see that blue again, desperately looking for it in photo and video archives, and on color swatches in paint stores.» (sfmoma.org)
The TONAL fabric fan holds 45 precision dyed fabric color swatches which fan out to show the whole range of harmonizing shades (shown in the square). (style-yourself-confident.com)