Adobe Photoshop color swatch format. Used for storing color palettes. Native format of the Adobe Photoshop image-editing application. ACO is an acronym derived from Adobe Color. Binary file format. Stores color specifications and, in Version 2 of the format, color names. Represents color values using 16 bits per color channel. Supports a variety of color spaces.
Import and Export support versions 1 and 2 of the ACO file format.