Denver and the country’s largest nonprofit theater group hope to raise millions by selling naming rights to the Colorado Convention Center, the Denver Performing Arts Complex and the individual theaters inside it, The Denver Post has learned. The plan could net tens of millions of dollars and help close funding gaps for proposed renovations, according to city officials and leaders at the Denver Center for the Performing Arts. But before the city-owned and nonprofit organizations that run these big cultural institutions can book a dime of new revenue, they’ll need to work through a thicket of restrictions and complex renovation and redevelopment plans, and navigate public sentiment that values familiar names over corporate logos. The city’s naming-rights plans would be separate from the Denver Center for the Performing Arts (DCPA), the nonprofit theater group that is the largest tenant in the Denver Performing Arts Complex.