Photoshop color chart

Quick answer：

A Photoshop color chart is a reference tool used in graphic design to select and manage colors consistently across different projects. It typically includes a range of color swatches, often organized in a grid or palette format, allowing designers to easily choose and apply specific hues, shades, and tones. These charts are often saved as separate files within Photoshop for easy access and can be customized according to specific design needs.