The people responsible for brand image at UMass have been incompetent for at least the 26 years since I matriculated. As much as I like it, my forest green UMass sweatshirt simply should never have been made.
Oddly enough, simply Google 'umass colors' and one gets:
http://www.umass.edu/umhome/identity/type_color.html
which is unambiguous in its assertion that Pantone 201 maroon is the only official color of UMass.
This is a direct quote:
"The official colors, UMass maroon (PMS® 201) and white, are a central component of the Graphic Identity Program for all print, product, and online applications. Correct and consistent use of the official colors helps reinforce the university's identity. Do not use another shade of red or maroon as a substitute for UMass maroon."
In the real world, people who ordered or allowed the manufacture of UMass logo wear with other colors would be fired. At UMass they probably get a raise for being innovative.