Different colors attract people's attention. If there is too much color it is difficult to read. There are more color choices for darkly colored paper than pastel.
We send annual information packets about our services to the members of our organization. Different services in different colors make the packet easy to use by the members. The product has been readily available over the years and is always the same good quality.
I like colorful documents. Easier for distribution and keeping. I have used this before and was well pleased. Price increases are becoming a problem. Our/my budjet is shrinking but this investment is good for us.