BOISE, Idaho — If anyone in the world — a high school in Texas, a college in New England, a university in Japan — wants to install an artificial turf field of any color besides green, it must first receive permission from the occupant of a corner office in a brick building at the center of the campus of Boise State University.

The office belongs to Rachael Bickerton, a London-born former music-licensing lawyer who had never seen football before she came to Idaho. For the past nine years, she has been the director of trademark licensing and enforcement for Boise State. In addition to protecting the university’s name and brand, she defends Boise State’s iconic blue turf football field from any copycats who would dull its luster.

To do that, Bickerton’s biggest weapon is a trademark — one that some experts deem overly broad and open to challenges — that effectively gives Boise State veto power over anyone looking to add a splash of color to anything but its end zones.

“I always wanted to drop the ‘enforcement’ because it’s not the sexy piece, is it?” Bickerton said of her title. “But we were making sure we had our house in order.”