Final answer:
The most widely used commercial color library is the PANTONE Matching System, known for standardizing color reproduction across various industries.
Step-by-step explanation:
In the realm of design and printing, certain commercial color libraries are considered industry standards due to their wide usage and consistency across different applications. One of the most well-known and extensively used color systems is the PANTONE Matching System. PANTONE provides a standardized color reproduction system that helps in color matching and design by assisting printers, designers, and manufacturers in defining and producing accurate colors across various materials and printing methods.
While other options listed, such as Epson, are associated with printer manufacturers, they do not provide a widely adopted color standard like PANTONE. HSK appears to be a typo and likely refers to HKS, a German color system that is less internationally prevalent compared to PANTONE. DCIM does not relate to a color library but is instead used in the context of digital camera file systems.