The new stadium the Jets and the Giants are scheduled to occupy in 2010 will be distinguished by an outer skin of aluminum louvers and by interior lighting that will switch colors depending on which team is playing at home. The changing colors ? green for the Jets, blue for the Giants ? reflect each team?s desire to individualize the look of the 82,500-seat stadium in East Rutherford, N.J. The teams? current home, Giants Stadium, opened in 1976, but the Jets have long felt like a second-class tenant there since arriving in 1984. The louvers in the new stadium, which are arranged in various densities, may also reflect the teams? colors. Although construction has been going on at the site north and east of Giants Stadium since April, groundbreaking on the $1.3 billion stadium will take place today, with officials from both teams; the N.F.L., including Commissioner Roger Goodell; and the state expected to attend.